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.

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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

Completed comprehensive Platinum Level maintenance on two-system residential HVAC setup consisting of a main system installed in 2022 and a newly installed mini-split system. Performed full system inspections including temperature readings, coil examinations, and filter assessments using 20x20x5 filters. Verified proper operation of both indoor and outdoor units, checked refrigerant temperatures at evaporator coils reading 72°F, inspected condensate drainage systems, and confirmed all electrical connections and disconnect boxes were secure and functioning properly.
Completed comprehensive Platinum Level maintenance on two-system residential HVAC setup consisting of a main system installed in 2022 and a newly installed mini-split system. Performed full system inspections including temperature readings, coil examinations, and filter assessments using 20x20x5 filters. Verified proper operation of both indoor and outdoor units, checked refrigerant temperatures at evaporator coils reading 72°F, inspected condensate drainage systems, and confirmed all electrical connections and disconnect boxes were secure and functioning properly.
Brent D.
Brent D. Checked in
Completed comprehensive Platinum Level maintenance on two-system residential HVAC setup consisting of a main system installed in 2022 and a newly installed mini-split system. Performed full system inspections including temperature readings, coil examinations, and filter assessments using 20x20x5 filters. Verified proper operation of both indoor and outdoor units, checked refrigerant temperatures at evaporator coils reading 72°F, inspected condensate drainage systems, and confirmed all electrical connections and disconnect boxes were secure and functioning properly.
Boonville, IN 47601
Responded to no cooling complaint on 3-year-old residential system experiencing short cycling with unit shutting down after 30 seconds of operation and no airflow through vents. Performed diagnostic evaluation and determined warranty evaporator coil failure as root cause of system malfunction. Documented equipment condition with photographic evidence showing indoor air handler installation and outdoor condensing unit. Coordinated with customer per warranty protocol for coil replacement authorization and scheduling.
Responded to no cooling complaint on 3-year-old residential system experiencing short cycling with unit shutting down after 30 seconds of operation and no airflow through vents. Performed diagnostic evaluation and determined warranty evaporator coil failure as root cause of system malfunction. Documented equipment condition with photographic evidence showing indoor air handler installation and outdoor condensing unit. Coordinated with customer per warranty protocol for coil replacement authorization and scheduling.
Cameron N.
Cameron N. Checked in
Responded to no cooling complaint on 3-year-old residential system experiencing short cycling with unit shutting down after 30 seconds of operation and no airflow through vents. Performed diagnostic evaluation and determined warranty evaporator coil failure as root cause of system malfunction. Documented equipment condition with photographic evidence showing indoor air handler installation and outdoor condensing unit. Coordinated with customer per warranty protocol for coil replacement authorization and scheduling.
Boonville, IN 47601
Successfully replaced defective furnace control board on residential heating system. Documented existing wiring configuration and component layout prior to removal, then installed new control board with proper electrical connections to ignitor, display module, and all associated safety circuits. Verified system operation and confirmed all diagnostic indicators functioning correctly upon completion.
Successfully replaced defective furnace control board on residential heating system. Documented existing wiring configuration and component layout prior to removal, then installed new control board with proper electrical connections to ignitor, display module, and all associated safety circuits. Verified system operation and confirmed all diagnostic indicators functioning correctly upon completion.
Francis I.
Francis I. Checked in
Successfully replaced defective furnace control board on residential heating system. Documented existing wiring configuration and component layout prior to removal, then installed new control board with proper electrical connections to ignitor, display module, and all associated safety circuits. Verified system operation and confirmed all diagnostic indicators functioning correctly upon completion.
Boonville, IN 47601
Completed Gold Level planned maintenance on an 11-year-old single-system HVAC unit during first visit. Performed comprehensive system diagnostics including electrical measurements with digital multimeter, recording voltage readings of 14.18V, and conducted thorough inspection of evaporator coil assembly and refrigerant lines. All components found operating within normal parameters, with minor dust accumulation noted on heat exchanger surfaces and metal panels.
Completed Gold Level planned maintenance on an 11-year-old single-system HVAC unit during first visit. Performed comprehensive system diagnostics including electrical measurements with digital multimeter, recording voltage readings of 14.18V, and conducted thorough inspection of evaporator coil assembly and refrigerant lines. All components found operating within normal parameters, with minor dust accumulation noted on heat exchanger surfaces and metal panels.
Michael H.
Michael H. Checked in
Completed Gold Level planned maintenance on an 11-year-old single-system HVAC unit during first visit. Performed comprehensive system diagnostics including electrical measurements with digital multimeter, recording voltage readings of 14.18V, and conducted thorough inspection of evaporator coil assembly and refrigerant lines. All components found operating within normal parameters, with minor dust accumulation noted on heat exchanger surfaces and metal panels.
Boonville, IN 47601
Conducted follow-up site visit to verify HVAC system performance after recent installation. Measured and documented supply air temperatures at multiple registers throughout the home, recording readings of 73.5°F at supply diffuser and verified proper airflow distribution at floor register locations. All measurements indicated system operating within normal parameters; no deficiencies identified or corrective action required.
Conducted follow-up site visit to verify HVAC system performance after recent installation. Measured and documented supply air temperatures at multiple registers throughout the home, recording readings of 73.5°F at supply diffuser and verified proper airflow distribution at floor register locations. All measurements indicated system operating within normal parameters; no deficiencies identified or corrective action required.
Brent D.
Brent D. Checked in
Conducted follow-up site visit to verify HVAC system performance after recent installation. Measured and documented supply air temperatures at multiple registers throughout the home, recording readings of 73.5°F at supply diffuser and verified proper airflow distribution at floor register locations. All measurements indicated system operating within normal parameters; no deficiencies identified or corrective action required.
Boonville, IN 47601
# HVAC Maintenance Summary

Completed comprehensive Platinum Level preventive maintenance on a 2-year-old HVAC system during the first annual service visit. Performed full system inspection of indoor air handler unit and electrical components, including capacitor testing and electrical connection verification. Replaced 25x25x4.5 air filter and inspected evaporator coil and blower assembly. Verified proper operation of condensate drainage system and checked all ductwork connections. Documented equipment condition with photographic records showing electrical compartment components and indoor unit configuration. All system components found operating within manufacturer specifications with no immediate repairs required.
# HVAC Maintenance Summary

Completed comprehensive Platinum Level preventive maintenance on a 2-year-old HVAC system during the first annual service visit. Performed full system inspection of indoor air handler unit and electrical components, including capacitor testing and electrical connection verification. Replaced 25x25x4.5 air filter and inspected evaporator coil and blower assembly. Verified proper operation of condensate drainage system and checked all ductwork connections. Documented equipment condition with photographic records showing electrical compartment components and indoor unit configuration. All system components found operating within manufacturer specifications with no immediate repairs required.
Michael H.
Michael H. Checked in
# HVAC Maintenance Summary Completed comprehensive Platinum Level preventive maintenance on a 2-year-old HVAC system during the first annual service visit. Performed full system inspection of indoor air handler unit and electrical components, including capacitor testing and electrical connection verification. Replaced 25x25x4.5 air filter and inspected evaporator coil and blower assembly. Verified proper operation of condensate drainage system and checked all ductwork connections. Documented equipment condition with photographic records showing electrical compartment components and indoor unit configuration. All system components found operating within manufacturer specifications with no immediate repairs required.
Boonville, IN 47601
Completed installation of a 4-ton, 15.5 SEER upflow air conditioning system with zoning capabilities. The new AC unit was integrated with the existing Rheem Classic 90 Plus furnace in the basement mechanical space, with proper refrigerant line connections, electrical wiring, condensate drainage via PVC piping, and insulated ductwork configuration to support the multi-zone climate control system.
Completed installation of a 4-ton, 15.5 SEER upflow air conditioning system with zoning capabilities. The new AC unit was integrated with the existing Rheem Classic 90 Plus furnace in the basement mechanical space, with proper refrigerant line connections, electrical wiring, condensate drainage via PVC piping, and insulated ductwork configuration to support the multi-zone climate control system.
Adam M.
Adam M. Checked in
Completed installation of a 4-ton, 15.5 SEER upflow air conditioning system with zoning capabilities. The new AC unit was integrated with the existing Rheem Classic 90 Plus furnace in the basement mechanical space, with proper refrigerant line connections, electrical wiring, condensate drainage via PVC piping, and insulated ductwork configuration to support the multi-zone climate control system.
Boonville, IN 47601
Boonville, IN - Completed second annual planned maintenance visit for Gold Level service agreement covering two HVAC systems, both approximately 6 years old. Performed comprehensive inspection and maintenance on Goodman Manufacturing equipment, including visual assessment of outdoor condensing unit exterior condition, refrigerant line connections, and manufacturer specification labels. Unit showed normal weathering and debris accumulation consistent with outdoor installation; cleaned accessible surfaces and removed organic matter from equipment casing.
Jeff J.
Jeff J. Checked in
Completed second annual planned maintenance visit for Gold Level service agreement covering two HVAC systems, both approximately 6 years old. Performed comprehensive inspection and maintenance on Goodman Manufacturing equipment, including visual assessment of outdoor condensing unit exterior condition, refrigerant line connections, and manufacturer specification labels. Unit showed normal weathering and debris accumulation consistent with outdoor installation; cleaned accessible surfaces and removed organic matter from equipment casing.
Boonville, IN 47601
Completed platinum-level monthly maintenance on 8-year-old HVAC system, including replacement of 16x25x5 filter. Performed comprehensive system inspection with temperature readings showing supply air at 136.5°F, indicating proper heat exchanger operation. Inspected electrical compartment, verifying all connections, capacitor condition, and contactor functionality, with all components operating within normal parameters.
Completed platinum-level monthly maintenance on 8-year-old HVAC system, including replacement of 16x25x5 filter. Performed comprehensive system inspection with temperature readings showing supply air at 136.5°F, indicating proper heat exchanger operation. Inspected electrical compartment, verifying all connections, capacitor condition, and contactor functionality, with all components operating within normal parameters.
Michael H.
Michael H. Checked in
Completed platinum-level monthly maintenance on 8-year-old HVAC system, including replacement of 16x25x5 filter. Performed comprehensive system inspection with temperature readings showing supply air at 136.5°F, indicating proper heat exchanger operation. Inspected electrical compartment, verifying all connections, capacitor condition, and contactor functionality, with all components operating within normal parameters.
Boonville, IN 47601
Completed annual planned maintenance visit for Gold Level service agreement covering two HVAC systems aged 5 years and 2 years respectively. Performed comprehensive inspection of both units including electrical components, capacitors, and CoreSense monitoring module. Verified proper operation of all controls and measured supply air temperature at 69.2°F at interior register. Replaced 16x25x5 and 14x20x1 air filters as part of routine maintenance protocol. All systems operating within normal parameters upon completion of service.
Completed annual planned maintenance visit for Gold Level service agreement covering two HVAC systems aged 5 years and 2 years respectively. Performed comprehensive inspection of both units including electrical components, capacitors, and CoreSense monitoring module. Verified proper operation of all controls and measured supply air temperature at 69.2°F at interior register. Replaced 16x25x5 and 14x20x1 air filters as part of routine maintenance protocol. All systems operating within normal parameters upon completion of service.
Michael H.
Michael H. Checked in
Completed annual planned maintenance visit for Gold Level service agreement covering two HVAC systems aged 5 years and 2 years respectively. Performed comprehensive inspection of both units including electrical components, capacitors, and CoreSense monitoring module. Verified proper operation of all controls and measured supply air temperature at 69.2°F at interior register. Replaced 16x25x5 and 14x20x1 air filters as part of routine maintenance protocol. All systems operating within normal parameters upon completion of service.
Boonville, IN 47601
Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Nick B.
Nick B. Checked in
Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Boonville, IN 47601
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Christian C.
Christian C. Checked in
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Boonville, IN 47601
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Nick B.
Nick B. Checked in
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Boonville, IN 47601
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Isaac G.
Isaac G. Checked in
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Boonville, IN 47601
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Brock B.
Brock B. Checked in
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Boonville, IN 47601
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Christian C.
Christian C. Checked in
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Boonville, IN 47601
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Brock B.
Brock B. Checked in
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Boonville, IN 47601
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Ricky B.
Ricky B. Checked in
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Boonville, IN 47601
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Michael H.
Michael H. Checked in
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Boonville, IN 47601
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Cole B.
Cole B. Checked in
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Boonville, IN 47601
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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.

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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.