Local HVAC Services In Boonville, IN | AC & Heating Repair
24/7 Emergency Service

HVAC emergencies happen when you least expect them. Contact the professionals at A+ Derr to take care of your issue. We have the necessary skills and tools to fix your system so you can safely use it once again. Call our team at 833-232-4328 to get emergency HVAC services in Louisville, KY, Evansville, IN, or the surrounding areas.

Call Today 833-232-4328 Schedule Online
FREE ESTIMATE Schedule Today! Request Service

Heating, Cooling & Indoor Air Quality in Boonville, IN

A good HVAC system in your home can make hot and cold days much more bearable. If your heater or air conditioner isn’t keeping up with the outdoor temperatures, look to A+ Derr Heating & Cooling for help. Our expert technicians can uncover the root cause of your system’s issues and provide the most necessary solutions.Contact the A+ Derr team online or call 833-232-4328 to schedule HVAC services at your Boonville home.

Heating Services

Staying warm during the cold winter months requires a top-notch heating unit. When it’s time for repair, replacement, or maintenance, turn to the pros at A+ Derr. We can provide services for every type of heating unit, including:

  • Furnaces: We guarantee that your furnace has a good heating element, blower motor, and air filter. We provide furnace installation, maintenance, and repairs.
  • Heat Pumps: We’ll make sure your heat pump is still moving heat energy into your home from outside.
  • Ductless mini-splits: We’ll ensure that your wall-mounted mini-split can still control the climate in your room.

Air Conditioning in Boonville, IN

Even in Indiana, the summer temperatures can reach well into the 80s and 90s. Is your AC ready to keep you cool all summer long? If not, turn to the A+ Derr team for assistance. We offer:

  • Installation and replacement: Our team can replace your old, dying AC with a brand-new, energy-efficient model.
  • Repair: Our staff can diagnose and resolve any problem going on with your AC unit.
  • Maintenance: Our crew can perform a comprehensive, multipoint inspection of the internal workings of your AC system.

Whether you have an air conditioner, heat pump, or series of ductless mini-splits, look to A+ Derr for the services you need most. Call 833-232-4328 now or contact us online to get started.

Benefits of Upgrading Your HVAC System

Replacing any part of your HVAC system can make a world of difference in your home’s climate. Just a few perks of replacing your system include:

  • Consistent heating and cooling for every room: Enjoy comfortable temperatures wherever you go in your house.
  • Lower energy bills and a reduced carbon footprint: Save money and help save the planet simultaneously.
  • Less chance of needing regular repairs and maintenance: New HVAC systems are much less likely to need repairs for a while after installation.

Reach out to A+ Derr online or call 833-232-4328 now to schedule HVAC system replacement services in Boonville.

Indoor Air Quality Services

Breathing the cleanest air possible is vital to your health. With the right indoor air quality services, you can rest easy knowing your air is pure. You may have low-quality air throughout your home if:

  • You have experienced more allergies in recent months
  • You notice layers of dust on your tables and surfaces
  • Your HVAC filters seem dustier than ever before

Enjoy clean air every day with help from A+ Derr. Contact us online or call our team at 833-232-4328 to schedule IAQ services.

Why Choose A+ Derr?

Since 1975, A+ Derr has been resolving HVAC problems for clients throughout the Boonville region. Our fourth-generation family business treats every client like one of our own. You can count on us for free estimates, 24/7 emergency service, Lennox-brand HVAC units, and a 100% satisfaction guarantee.Schedule HVAC services in Boonville, IN, now by calling 833-232-4328 or contacting us online.

Recent Jobs and Reviews in Boonville, IN

Job Locations and Reviews

Responded to no-cool complaint on 11-year-old residential air conditioning system experiencing evaporator coil freeze-up and reduced cooling capacity. Upon arrival, confirmed ice buildup on indoor coil assembly near furnace area and diminished airflow from supply registers. Inspected outdoor condensing unit and indoor air handler components. Diagnosed frozen evaporator coil caused by restricted airflow due to severely clogged air filter. Allowed system to thaw completely before proceeding with repairs. Replaced dirty air filter with new high-efficiency filter. Verified proper airflow restoration across evaporator coil. Checked refrigerant pressures and confirmed system operating within manufacturer specifications. Cycled system through complete cooling cycle to verify ice formation eliminated and adequate cooling restored. Educated homeowner on importance of regular filter maintenance to prevent future freeze-up conditions.
Responded to no-cool complaint on 11-year-old residential air conditioning system experiencing evaporator coil freeze-up and reduced cooling capacity. Upon arrival, confirmed ice buildup on indoor coil assembly near furnace area and diminished airflow from supply registers. Inspected outdoor condensing unit and indoor air handler components. Diagnosed frozen evaporator coil caused by restricted airflow due to severely clogged air filter. Allowed system to thaw completely before proceeding with repairs. Replaced dirty air filter with new high-efficiency filter. Verified proper airflow restoration across evaporator coil. Checked refrigerant pressures and confirmed system operating within manufacturer specifications. Cycled system through complete cooling cycle to verify ice formation eliminated and adequate cooling restored. Educated homeowner on importance of regular filter maintenance to prevent future freeze-up conditions.
Danny M.
Danny M. Checked in
Responded to no-cool complaint on 11-year-old residential air conditioning system experiencing evaporator coil freeze-up and reduced cooling capacity. Upon arrival, confirmed ice buildup on indoor coil assembly near furnace area and diminished airflow from supply registers. Inspected outdoor condensing unit and indoor air handler components. Diagnosed frozen evaporator coil caused by restricted airflow due to severely clogged air filter. Allowed system to thaw completely before proceeding with repairs. Replaced dirty air filter with new high-efficiency filter. Verified proper airflow restoration across evaporator coil. Checked refrigerant pressures and confirmed system operating within manufacturer specifications. Cycled system through complete cooling cycle to verify ice formation eliminated and adequate cooling restored. Educated homeowner on importance of regular filter maintenance to prevent future freeze-up conditions.
Boonville, IN 47601
Completed annual second visit Gold Level planned maintenance on 2-year-old HVAC system. Performed comprehensive inspection of outdoor condenser unit and verified operational status of all components including fan motor, compressor, and refrigerant levels. Documented equipment condition through photographic records of both the outdoor condensing unit and 30-gallon A.O. Smith natural gas water heater. Customer requires 16x25x5 filter size and is due for service plan renewal.
Completed annual second visit Gold Level planned maintenance on 2-year-old HVAC system. Performed comprehensive inspection of outdoor condenser unit and verified operational status of all components including fan motor, compressor, and refrigerant levels. Documented equipment condition through photographic records of both the outdoor condensing unit and 30-gallon A.O. Smith natural gas water heater. Customer requires 16x25x5 filter size and is due for service plan renewal.
Jeremiah H.
Jeremiah H. Checked in
Completed annual second visit Gold Level planned maintenance on 2-year-old HVAC system. Performed comprehensive inspection of outdoor condenser unit and verified operational status of all components including fan motor, compressor, and refrigerant levels. Documented equipment condition through photographic records of both the outdoor condensing unit and 30-gallon A.O. Smith natural gas water heater. Customer requires 16x25x5 filter size and is due for service plan renewal.
Boonville, IN 47601
Completed annual Platinum Level planned maintenance on two 2-year-old HVAC systems during first service visit. Performed comprehensive inspection of both units, replaced heavily soiled air filters (14x20x3 and 16x20x3) showing significant dust accumulation, inspected outdoor condenser unit with proper airflow through louvered panels and functional fan guard, verified equipment operation and documented conditions with service photos.
Completed annual Platinum Level planned maintenance on two 2-year-old HVAC systems during first service visit. Performed comprehensive inspection of both units, replaced heavily soiled air filters (14x20x3 and 16x20x3) showing significant dust accumulation, inspected outdoor condenser unit with proper airflow through louvered panels and functional fan guard, verified equipment operation and documented conditions with service photos.
Jeremiah H.
Jeremiah H. Checked in
Completed annual Platinum Level planned maintenance on two 2-year-old HVAC systems during first service visit. Performed comprehensive inspection of both units, replaced heavily soiled air filters (14x20x3 and 16x20x3) showing significant dust accumulation, inspected outdoor condenser unit with proper airflow through louvered panels and functional fan guard, verified equipment operation and documented conditions with service photos.
Boonville, IN 47601
Completed annual Platinum Level maintenance on single-system Lennox HVAC unit with 16x25x5 filter configuration. Performed comprehensive system inspection including control board diagnostics, thermostat functionality verification (Model 107088-01, Software Rev. 4.31.0069), and all standard maintenance protocols per manufacturer specifications. System operating within normal parameters with no deficiencies noted.
Completed annual Platinum Level maintenance on single-system Lennox HVAC unit with 16x25x5 filter configuration. Performed comprehensive system inspection including control board diagnostics, thermostat functionality verification (Model 107088-01, Software Rev. 4.31.0069), and all standard maintenance protocols per manufacturer specifications. System operating within normal parameters with no deficiencies noted.
Brent D.
Brent D. Checked in
Completed annual Platinum Level maintenance on single-system Lennox HVAC unit with 16x25x5 filter configuration. Performed comprehensive system inspection including control board diagnostics, thermostat functionality verification (Model 107088-01, Software Rev. 4.31.0069), and all standard maintenance protocols per manufacturer specifications. System operating within normal parameters with no deficiencies noted.
Boonville, IN 47601
Boonville, IN - Responded to no cooling call on 11-year-old residential HVAC system. Upon arrival, found Honeywell Home digital thermostat displaying low battery warning and system completely non-operational. Confirmed homeowner had already attempted to replace batteries without success. Diagnosed faulty thermostat requiring replacement to restore system operation.
Francis I.
Francis I. Checked in
Responded to no cooling call on 11-year-old residential HVAC system. Upon arrival, found Honeywell Home digital thermostat displaying low battery warning and system completely non-operational. Confirmed homeowner had already attempted to replace batteries without success. Diagnosed faulty thermostat requiring replacement to restore system operation.
Boonville, IN 47601
Performed scheduled maintenance flush on Navien tankless water heater per customer's requested appointment time. Completed descaling procedure using flush kit with cleaning solution to remove mineral buildup from heat exchanger, ensuring optimal unit performance and efficiency. Applied service sticker documenting maintenance completion date. Unit tested and operating within normal parameters upon service completion.
Performed scheduled maintenance flush on Navien tankless water heater per customer's requested appointment time. Completed descaling procedure using flush kit with cleaning solution to remove mineral buildup from heat exchanger, ensuring optimal unit performance and efficiency. Applied service sticker documenting maintenance completion date. Unit tested and operating within normal parameters upon service completion.
Kyle D.
Kyle D. Checked in
Performed scheduled maintenance flush on Navien tankless water heater per customer's requested appointment time. Completed descaling procedure using flush kit with cleaning solution to remove mineral buildup from heat exchanger, ensuring optimal unit performance and efficiency. Applied service sticker documenting maintenance completion date. Unit tested and operating within normal parameters upon service completion.
Boonville, IN 47601
Completed full HVAC system installation including a 2.5-ton, 15.5 SEER air conditioning unit and 97% AFUE high-efficiency upflow furnace. Installed Lennox outdoor condenser on concrete pad with proper electrical connections and refrigerant line set, positioned new furnace system in basement utility area with complete white insulated supply ductwork distribution throughout residence, and verified all equipment operational per manufacturer specifications.
Completed full HVAC system installation including a 2.5-ton, 15.5 SEER air conditioning unit and 97% AFUE high-efficiency upflow furnace. Installed Lennox outdoor condenser on concrete pad with proper electrical connections and refrigerant line set, positioned new furnace system in basement utility area with complete white insulated supply ductwork distribution throughout residence, and verified all equipment operational per manufacturer specifications.
Adam M.
Adam M. Checked in
Completed full HVAC system installation including a 2.5-ton, 15.5 SEER air conditioning unit and 97% AFUE high-efficiency upflow furnace. Installed Lennox outdoor condenser on concrete pad with proper electrical connections and refrigerant line set, positioned new furnace system in basement utility area with complete white insulated supply ductwork distribution throughout residence, and verified all equipment operational per manufacturer specifications.
Boonville, IN 47601
Completed Platinum Level maintenance on single HVAC system during first visit of 2-year service agreement. Performed comprehensive system inspection, replaced 25x25x4 air filter, checked temperature differentials across system using digital thermometer, verified proper airflow through ductwork, and documented equipment condition with photos. All components operating within normal parameters, and system showing proper heating/cooling performance with adequate insulation on ductwork and proper drainage configuration.
Completed Platinum Level maintenance on single HVAC system during first visit of 2-year service agreement. Performed comprehensive system inspection, replaced 25x25x4 air filter, checked temperature differentials across system using digital thermometer, verified proper airflow through ductwork, and documented equipment condition with photos. All components operating within normal parameters, and system showing proper heating/cooling performance with adequate insulation on ductwork and proper drainage configuration.
Michael H.
Michael H. Checked in
Completed Platinum Level maintenance on single HVAC system during first visit of 2-year service agreement. Performed comprehensive system inspection, replaced 25x25x4 air filter, checked temperature differentials across system using digital thermometer, verified proper airflow through ductwork, and documented equipment condition with photos. All components operating within normal parameters, and system showing proper heating/cooling performance with adequate insulation on ductwork and proper drainage configuration.
Boonville, IN 47601
# HVAC Maintenance - Planned Single Maintenance

Completed comprehensive Gold Level annual maintenance on 8-year-old residential HVAC system with 20x25x5 filter configuration. Performed electrical diagnostics using Fieldpiece SC440 True RMS clamp meter, measuring system amperage and voltage readings to verify proper operation of compressor and blower motor. All electrical parameters tested within manufacturer specifications, with amp draw reading 50.3A indicating normal compressor operation under load. Inspected evaporator coil fins, condenser unit components, and verified refrigerant pressures. System operating efficiently with no deficiencies noted during first annual service visit.
# HVAC Maintenance - Planned Single Maintenance

Completed comprehensive Gold Level annual maintenance on 8-year-old residential HVAC system with 20x25x5 filter configuration. Performed electrical diagnostics using Fieldpiece SC440 True RMS clamp meter, measuring system amperage and voltage readings to verify proper operation of compressor and blower motor. All electrical parameters tested within manufacturer specifications, with amp draw reading 50.3A indicating normal compressor operation under load. Inspected evaporator coil fins, condenser unit components, and verified refrigerant pressures. System operating efficiently with no deficiencies noted during first annual service visit.
Michael H.
Michael H. Checked in
# HVAC Maintenance - Planned Single Maintenance Completed comprehensive Gold Level annual maintenance on 8-year-old residential HVAC system with 20x25x5 filter configuration. Performed electrical diagnostics using Fieldpiece SC440 True RMS clamp meter, measuring system amperage and voltage readings to verify proper operation of compressor and blower motor. All electrical parameters tested within manufacturer specifications, with amp draw reading 50.3A indicating normal compressor operation under load. Inspected evaporator coil fins, condenser unit components, and verified refrigerant pressures. System operating efficiently with no deficiencies noted during first annual service visit.
Boonville, IN 47601
Conducted comprehensive HVAC system replacement estimate for existing residential air conditioning system. Evaluated outdoor condenser unit showing age-related wear and exterior discoloration, assessed electrical disconnect and associated wiring, and inspected Jackson Systems control panel for compatibility with replacement equipment options. Documented current system configuration and provided homeowner with equipment replacement recommendations to improve efficiency and reliability.
Conducted comprehensive HVAC system replacement estimate for existing residential air conditioning system. Evaluated outdoor condenser unit showing age-related wear and exterior discoloration, assessed electrical disconnect and associated wiring, and inspected Jackson Systems control panel for compatibility with replacement equipment options. Documented current system configuration and provided homeowner with equipment replacement recommendations to improve efficiency and reliability.
James W.
James W. Checked in
Conducted comprehensive HVAC system replacement estimate for existing residential air conditioning system. Evaluated outdoor condenser unit showing age-related wear and exterior discoloration, assessed electrical disconnect and associated wiring, and inspected Jackson Systems control panel for compatibility with replacement equipment options. Documented current system configuration and provided homeowner with equipment replacement recommendations to improve efficiency and reliability.
Boonville, IN 47601
Performed comprehensive assessment of non-functional central air conditioning system affecting entire residence. Evaluated existing HVAC equipment including furnace/air handler unit, ductwork connections, and associated mechanical components in basement utility area. Unit confirmed to be at minimum 9 years old with age of ductwork system undetermined. Documented current equipment configuration and mechanical room layout through photographic evidence showing white vertical air handler, metallic supply/return ductwork, and electrical panel connections. Provided estimate for complete AC system replacement due to equipment failure and age-related deterioration beyond economical repair.
Performed comprehensive assessment of non-functional central air conditioning system affecting entire residence. Evaluated existing HVAC equipment including furnace/air handler unit, ductwork connections, and associated mechanical components in basement utility area. Unit confirmed to be at minimum 9 years old with age of ductwork system undetermined. Documented current equipment configuration and mechanical room layout through photographic evidence showing white vertical air handler, metallic supply/return ductwork, and electrical panel connections. Provided estimate for complete AC system replacement due to equipment failure and age-related deterioration beyond economical repair.
Nick B.
Nick B. Checked in
Performed comprehensive assessment of non-functional central air conditioning system affecting entire residence. Evaluated existing HVAC equipment including furnace/air handler unit, ductwork connections, and associated mechanical components in basement utility area. Unit confirmed to be at minimum 9 years old with age of ductwork system undetermined. Documented current equipment configuration and mechanical room layout through photographic evidence showing white vertical air handler, metallic supply/return ductwork, and electrical panel connections. Provided estimate for complete AC system replacement due to equipment failure and age-related deterioration beyond economical repair.
Boonville, IN 47601
Completed annual Platinum Level maintenance on 3-year-old HVAC system. Accessed property through back door per customer instructions and began inspection with outdoor unit. Performed comprehensive system evaluation including refrigerant analysis using digital gauges, confirming R-410A charge levels with suction pressure at 124.7 psig, liquid pressure at 255.7 psig, superheat at 9.0°F, and subcooling at 5.9°F. Measured and recorded ambient and operational temperatures with calibrated instruments showing 71.8°F readings. Replaced 20x25x5 air filter and completed all Platinum Level service checklist items for both indoor and outdoor components. System operating within manufacturer specifications. This represents the second annual visit; customer due for renewal.
Completed annual Platinum Level maintenance on 3-year-old HVAC system. Accessed property through back door per customer instructions and began inspection with outdoor unit. Performed comprehensive system evaluation including refrigerant analysis using digital gauges, confirming R-410A charge levels with suction pressure at 124.7 psig, liquid pressure at 255.7 psig, superheat at 9.0°F, and subcooling at 5.9°F. Measured and recorded ambient and operational temperatures with calibrated instruments showing 71.8°F readings. Replaced 20x25x5 air filter and completed all Platinum Level service checklist items for both indoor and outdoor components. System operating within manufacturer specifications. This represents the second annual visit; customer due for renewal.
Francis I.
Francis I. Checked in
Completed annual Platinum Level maintenance on 3-year-old HVAC system. Accessed property through back door per customer instructions and began inspection with outdoor unit. Performed comprehensive system evaluation including refrigerant analysis using digital gauges, confirming R-410A charge levels with suction pressure at 124.7 psig, liquid pressure at 255.7 psig, superheat at 9.0°F, and subcooling at 5.9°F. Measured and recorded ambient and operational temperatures with calibrated instruments showing 71.8°F readings. Replaced 20x25x5 air filter and completed all Platinum Level service checklist items for both indoor and outdoor components. System operating within manufacturer specifications. This represents the second annual visit; customer due for renewal.
Boonville, IN 47601
Responded to no heating or cooling call and found 20-year-old thermostat inoperative, preventing system operation. Evaluated outdoor condenser unit which showed signs of age and neglect with significant vegetation overgrowth restricting airflow and debris accumulation on top cover. Measured supply air temperature at 30.5°F, confirming system capability when powered. Diagnosed failed thermostat as primary issue preventing system calls for heating and cooling modes.
Responded to no heating or cooling call and found 20-year-old thermostat inoperative, preventing system operation. Evaluated outdoor condenser unit which showed signs of age and neglect with significant vegetation overgrowth restricting airflow and debris accumulation on top cover. Measured supply air temperature at 30.5°F, confirming system capability when powered. Diagnosed failed thermostat as primary issue preventing system calls for heating and cooling modes.
Craig U.
Craig U. Checked in
Responded to no heating or cooling call and found 20-year-old thermostat inoperative, preventing system operation. Evaluated outdoor condenser unit which showed signs of age and neglect with significant vegetation overgrowth restricting airflow and debris accumulation on top cover. Measured supply air temperature at 30.5°F, confirming system capability when powered. Diagnosed failed thermostat as primary issue preventing system calls for heating and cooling modes.
Boonville, IN 47601
Responded to no cooling complaint on 7-year-old residential HVAC system. Upon arrival, confirmed unit was blowing air in fan mode but not cooling in auto mode with thermostat set to 70°F and indoor temperature reading 80°F. Performed diagnostic evaluation of both indoor and outdoor units. Identified failed evaporator coil and malfunctioning thermal expansion valve (TXV) as root cause of cooling loss. Provided estimate for replacement of evaporator coil and TXV with approximately 4 hours labor required for repair. Unit covered under home warranty. Documented equipment with photographs and collected necessary model and serial number information to expedite parts ordering process.
Responded to no cooling complaint on 7-year-old residential HVAC system. Upon arrival, confirmed unit was blowing air in fan mode but not cooling in auto mode with thermostat set to 70°F and indoor temperature reading 80°F. Performed diagnostic evaluation of both indoor and outdoor units. Identified failed evaporator coil and malfunctioning thermal expansion valve (TXV) as root cause of cooling loss. Provided estimate for replacement of evaporator coil and TXV with approximately 4 hours labor required for repair. Unit covered under home warranty. Documented equipment with photographs and collected necessary model and serial number information to expedite parts ordering process.
Danny M.
Danny M. Checked in
Responded to no cooling complaint on 7-year-old residential HVAC system. Upon arrival, confirmed unit was blowing air in fan mode but not cooling in auto mode with thermostat set to 70°F and indoor temperature reading 80°F. Performed diagnostic evaluation of both indoor and outdoor units. Identified failed evaporator coil and malfunctioning thermal expansion valve (TXV) as root cause of cooling loss. Provided estimate for replacement of evaporator coil and TXV with approximately 4 hours labor required for repair. Unit covered under home warranty. Documented equipment with photographs and collected necessary model and serial number information to expedite parts ordering process.
Boonville, IN 47601
Completed first scheduled platinum-level preventive maintenance on a 14-year-old single HVAC system, utilizing a 16x25x5 air filter. Upon arrival, customer communicated an unrelated plumbing concern regarding copper pipe and PVC replacement from water meter to main line. Performed comprehensive system inspection, replaced air filter, and documented equipment condition with photographs showing insulation material and system components with visible age-related wear.
Completed first scheduled platinum-level preventive maintenance on a 14-year-old single HVAC system, utilizing a 16x25x5 air filter. Upon arrival, customer communicated an unrelated plumbing concern regarding copper pipe and PVC replacement from water meter to main line. Performed comprehensive system inspection, replaced air filter, and documented equipment condition with photographs showing insulation material and system components with visible age-related wear.
Luke O.
Luke O. Checked in
Completed first scheduled platinum-level preventive maintenance on a 14-year-old single HVAC system, utilizing a 16x25x5 air filter. Upon arrival, customer communicated an unrelated plumbing concern regarding copper pipe and PVC replacement from water meter to main line. Performed comprehensive system inspection, replaced air filter, and documented equipment condition with photographs showing insulation material and system components with visible age-related wear.
Boonville, IN 47601
Completed planned maintenance on 4-year-old HVAC system during first service visit. Performed electrical diagnostics using digital multimeter to verify system performance and measured temperature differential across heat exchanger coils, recording 72°F reading. Inspected 16x25x5 filter and verified proper system operation with all components functioning within normal parameters.
Completed planned maintenance on 4-year-old HVAC system during first service visit. Performed electrical diagnostics using digital multimeter to verify system performance and measured temperature differential across heat exchanger coils, recording 72°F reading. Inspected 16x25x5 filter and verified proper system operation with all components functioning within normal parameters.
Michael H.
Michael H. Checked in
Completed planned maintenance on 4-year-old HVAC system during first service visit. Performed electrical diagnostics using digital multimeter to verify system performance and measured temperature differential across heat exchanger coils, recording 72°F reading. Inspected 16x25x5 filter and verified proper system operation with all components functioning within normal parameters.
Boonville, IN 47601
Completed second annual Gold Level planned maintenance visit on 8-year-old HVAC system. Performed comprehensive system diagnostics using calibrated digital multimeter, recording temperature and electrical readings to verify proper operation. Measured supply air temperature at 70.5°F and inspected evaporator coil area with reflective ductwork insulation intact. Conducted standard maintenance protocol including filter inspection for 24x25x5 filter size, electrical component testing, and overall system performance evaluation. All measurements within normal operating parameters. System operating efficiently with no deficiencies noted. Customer due for service agreement renewal.
Completed second annual Gold Level planned maintenance visit on 8-year-old HVAC system. Performed comprehensive system diagnostics using calibrated digital multimeter, recording temperature and electrical readings to verify proper operation. Measured supply air temperature at 70.5°F and inspected evaporator coil area with reflective ductwork insulation intact. Conducted standard maintenance protocol including filter inspection for 24x25x5 filter size, electrical component testing, and overall system performance evaluation. All measurements within normal operating parameters. System operating efficiently with no deficiencies noted. Customer due for service agreement renewal.
Michael H.
Michael H. Checked in
Completed second annual Gold Level planned maintenance visit on 8-year-old HVAC system. Performed comprehensive system diagnostics using calibrated digital multimeter, recording temperature and electrical readings to verify proper operation. Measured supply air temperature at 70.5°F and inspected evaporator coil area with reflective ductwork insulation intact. Conducted standard maintenance protocol including filter inspection for 24x25x5 filter size, electrical component testing, and overall system performance evaluation. All measurements within normal operating parameters. System operating efficiently with no deficiencies noted. Customer due for service agreement renewal.
Boonville, IN 47601
Completed comprehensive HVAC replacement estimate for air conditioning system at residential property. Evaluated existing furnace and air handler configuration in basement utility area, assessed ductwork and air return system, and documented current equipment specifications including gas line connections, PVC condensate drainage, and plenum installation. Provided homeowner with detailed replacement options for AC unit only, as existing furnace remains operational.
Completed comprehensive HVAC replacement estimate for air conditioning system at residential property. Evaluated existing furnace and air handler configuration in basement utility area, assessed ductwork and air return system, and documented current equipment specifications including gas line connections, PVC condensate drainage, and plenum installation. Provided homeowner with detailed replacement options for AC unit only, as existing furnace remains operational.
Nick B.
Nick B. Checked in
Completed comprehensive HVAC replacement estimate for air conditioning system at residential property. Evaluated existing furnace and air handler configuration in basement utility area, assessed ductwork and air return system, and documented current equipment specifications including gas line connections, PVC condensate drainage, and plenum installation. Provided homeowner with detailed replacement options for AC unit only, as existing furnace remains operational.
Boonville, IN 47601
Responded to no cooling call on approximately 10-year-old residential HVAC system with thermostat set to 72°F but indoor temperature reading 80°F. Upon arrival, confirmed adequate airflow through supply vents with blower operational and no ice buildup present at indoor coil. Performed diagnostic evaluation of outdoor condensing unit located beneath deck structure and indoor air handler/furnace system in basement. Identified cooling system deficiency preventing proper temperature satisfaction. Completed necessary repairs to restore cooling capacity and verified system operation with proper airflow and refrigerant cycle functionality. System returned to normal cooling operation with thermostat achieving setpoint.
Responded to no cooling call on approximately 10-year-old residential HVAC system with thermostat set to 72°F but indoor temperature reading 80°F. Upon arrival, confirmed adequate airflow through supply vents with blower operational and no ice buildup present at indoor coil. Performed diagnostic evaluation of outdoor condensing unit located beneath deck structure and indoor air handler/furnace system in basement. Identified cooling system deficiency preventing proper temperature satisfaction. Completed necessary repairs to restore cooling capacity and verified system operation with proper airflow and refrigerant cycle functionality. System returned to normal cooling operation with thermostat achieving setpoint.
Danny M.
Danny M. Checked in
Responded to no cooling call on approximately 10-year-old residential HVAC system with thermostat set to 72°F but indoor temperature reading 80°F. Upon arrival, confirmed adequate airflow through supply vents with blower operational and no ice buildup present at indoor coil. Performed diagnostic evaluation of outdoor condensing unit located beneath deck structure and indoor air handler/furnace system in basement. Identified cooling system deficiency preventing proper temperature satisfaction. Completed necessary repairs to restore cooling capacity and verified system operation with proper airflow and refrigerant cycle functionality. System returned to normal cooling operation with thermostat achieving setpoint.
Boonville, IN 47601
Responded to emergency water leak call for upstairs HVAC system (2 years old) actively dripping onto kitchen counters below. Upon inspection, discovered significant condensation accumulation on air handler drain pan and associated components in attic mechanical space. Identified clogged condensate drain line preventing proper drainage, causing overflow condition. Cleared blockage from primary drain line using appropriate tools and verified proper flow. Inspected secondary drain pan for damage and confirmed structural integrity. Tested system operation and monitored drain function to ensure leak was resolved. Documented moisture damage on kitchen ceiling showing visible crack along wall junction from water intrusion. Advised homeowner to monitor affected drywall area for further deterioration and recommended follow-up with contractor for cosmetic ceiling repairs once area fully dries. System returned to normal operation with proper condensate drainage restored.
Responded to emergency water leak call for upstairs HVAC system (2 years old) actively dripping onto kitchen counters below. Upon inspection, discovered significant condensation accumulation on air handler drain pan and associated components in attic mechanical space. Identified clogged condensate drain line preventing proper drainage, causing overflow condition. Cleared blockage from primary drain line using appropriate tools and verified proper flow. Inspected secondary drain pan for damage and confirmed structural integrity. Tested system operation and monitored drain function to ensure leak was resolved. Documented moisture damage on kitchen ceiling showing visible crack along wall junction from water intrusion. Advised homeowner to monitor affected drywall area for further deterioration and recommended follow-up with contractor for cosmetic ceiling repairs once area fully dries. System returned to normal operation with proper condensate drainage restored.
Francis I.
Francis I. Checked in
Responded to emergency water leak call for upstairs HVAC system (2 years old) actively dripping onto kitchen counters below. Upon inspection, discovered significant condensation accumulation on air handler drain pan and associated components in attic mechanical space. Identified clogged condensate drain line preventing proper drainage, causing overflow condition. Cleared blockage from primary drain line using appropriate tools and verified proper flow. Inspected secondary drain pan for damage and confirmed structural integrity. Tested system operation and monitored drain function to ensure leak was resolved. Documented moisture damage on kitchen ceiling showing visible crack along wall junction from water intrusion. Advised homeowner to monitor affected drywall area for further deterioration and recommended follow-up with contractor for cosmetic ceiling repairs once area fully dries. System returned to normal operation with proper condensate drainage restored.
Boonville, IN 47601
Start Saving Today With

Membership Perks

Start Saving Today With

Membership Perks

What To Expect

Discover The A+ Derr Difference

24/7 Heating & Cooling Repairs​

Heating and cooling emergencies can happen on nights, weekends, and holidays, so you can trust us to be there no matter when you need us.

Licensed & Experienced Technicians​

Our experts have the expertise and training to deliver the highest quality services every time.

100% Satisfaction Guarantee​

Our team is dedicated to ensuring your 100% satisfaction with every HVAC service we perform.

Servicing All Major Makes & Models Of Equipment

We are a Lennox Premier Dealer and also service on all makes and models of equipment, including Goodman, Amana, Carrier, Trane, Rheem & more!

Locally Owned & Operated​

Since we’re based in Kentuckiana, we know the needs of Evansville, Louisville, and surrounding communities.

50+ Years in Business​

For over 50 years, A+ Derr has provided high-quality service, products, and results for Kentuckiana's residents.

24/7 Heating & Cooling Repairs​

Heating and cooling emergencies can happen on nights, weekends, and holidays, so you can trust us to be there no matter when you need us.

Licensed & Experienced Technicians​

Our experts have the expertise and training to deliver the highest quality services every time.

100% Satisfaction Guarantee​

Our team is dedicated to ensuring your 100% satisfaction with every HVAC service we perform.

Servicing All Major Makes & Models Of Equipment

We are a Lennox Premier Dealer and also service on all makes and models of equipment, including Goodman, Amana, Carrier, Trane, Rheem & more!

Locally Owned & Operated​

Since we’re based in Kentuckiana, we know the needs of Evansville, Louisville, and surrounding communities.

50+ Years in Business​

For over 50 years, A+ Derr has provided high-quality service, products, and results for Kentuckiana's residents.

Review Image
Our Reviews

See What Your Neighbors Are Saying

I would recommend A+ Derr and their staff any day! Best service I have ever had! Go to them for your Heating and Cooling needs. You will not be disappointed.

Barbara C.

Barbara C.

Very good service. Knowledgeable HVAC experts always keeping us cool in the summer and warm all winter. This is a great team of professionals from start to finish.

Craig B.

Craig B.

Amazing level of courtesy and professionalism. Communication was great and the price was more than reasonable. Highly recommend.

Chip M.

Chip M.

Guys came and installed two full systems at the house. Respectful, cleaned up after themselves and answered any and all questions. Thank you again!! Definitely recommend!

Jason H.

Jason H.

Very knowledgeable and courteous. Toured me through all the functions of the new unit. Completed work very neatly and respectfully. Would recommend to anyone.

Derek S.

Derek S.