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 annual Platinum Level maintenance on single HVAC system during second visit of the service term. Inspected outdoor condensing unit and internal components including capacitor and CoreSense Diagnostics module, verified all electrical connections and wiring integrity, replaced 16x25x5 air filter, and confirmed system operational status. Customer approved service term renewal for continued coverage.
Completed annual Platinum Level maintenance on single HVAC system during second visit of the service term. Inspected outdoor condensing unit and internal components including capacitor and CoreSense Diagnostics module, verified all electrical connections and wiring integrity, replaced 16x25x5 air filter, and confirmed system operational status. Customer approved service term renewal for continued coverage.
Michael H.
Michael H. Checked in
Completed annual Platinum Level maintenance on single HVAC system during second visit of the service term. Inspected outdoor condensing unit and internal components including capacitor and CoreSense Diagnostics module, verified all electrical connections and wiring integrity, replaced 16x25x5 air filter, and confirmed system operational status. Customer approved service term renewal for continued coverage.
Boonville, IN 47601
Boonville, IN - Completed follow-up visit to address previously incomplete work on outdoor condensing unit. Documented current condition of equipment, noting significant dirt and debris accumulation on condenser coil panels and exterior surfaces requiring attention. Unit remains operational on concrete pad with proper drainage and electrical connections intact.
Danny M.
Danny M. Checked in
Completed follow-up visit to address previously incomplete work on outdoor condensing unit. Documented current condition of equipment, noting significant dirt and debris accumulation on condenser coil panels and exterior surfaces requiring attention. Unit remains operational on concrete pad with proper drainage and electrical connections intact.
Boonville, IN 47601
Completed installation of a 2.5-ton, 15.2 SEER heat pump system with matching air handler in residential basement location. Performed system commissioning including refrigerant charge verification, pressure testing, and operational diagnostics using calibrated manifold gauges to ensure proper system performance and efficiency.
Completed installation of a 2.5-ton, 15.2 SEER heat pump system with matching air handler in residential basement location. Performed system commissioning including refrigerant charge verification, pressure testing, and operational diagnostics using calibrated manifold gauges to ensure proper system performance and efficiency.
Cole B.
Cole B. Checked in
Completed installation of a 2.5-ton, 15.2 SEER heat pump system with matching air handler in residential basement location. Performed system commissioning including refrigerant charge verification, pressure testing, and operational diagnostics using calibrated manifold gauges to ensure proper system performance and efficiency.
Boonville, IN 47601
Boonville, IN - Responded to service call for air conditioning system running constantly with inadequate cooling throughout residence. Upon arrival, performed comprehensive diagnostic evaluation of outdoor condensing unit. Conducted visual inspection of equipment, checking refrigerant lines, electrical connections, and overall system operation. Utilized diagnostic tools to assess system performance and identify root cause of continuous runtime and insufficient cooling capacity. Documented equipment condition with photographic evidence showing outdoor unit installation and surrounding area for service records.
Danny M.
Danny M. Checked in
Responded to service call for air conditioning system running constantly with inadequate cooling throughout residence. Upon arrival, performed comprehensive diagnostic evaluation of outdoor condensing unit. Conducted visual inspection of equipment, checking refrigerant lines, electrical connections, and overall system operation. Utilized diagnostic tools to assess system performance and identify root cause of continuous runtime and insufficient cooling capacity. Documented equipment condition with photographic evidence showing outdoor unit installation and surrounding area for service records.
Boonville, IN 47601
Responded to no cooling complaint on residential HVAC system located in basement. Upon inspection, diagnosed failed evaporator coil and thermal expansion valve (TXV) on Aspen refrigerant evaporator unit, model CC6004A-2ASL-05S utilizing R-410A refrigerant. Parts have been ordered for follow-up replacement requiring approximately half-day installation time, with system currently in non-operational status until repair completion.
Responded to no cooling complaint on residential HVAC system located in basement. Upon inspection, diagnosed failed evaporator coil and thermal expansion valve (TXV) on Aspen refrigerant evaporator unit, model CC6004A-2ASL-05S utilizing R-410A refrigerant. Parts have been ordered for follow-up replacement requiring approximately half-day installation time, with system currently in non-operational status until repair completion.
Danny M.
Danny M. Checked in
Responded to no cooling complaint on residential HVAC system located in basement. Upon inspection, diagnosed failed evaporator coil and thermal expansion valve (TXV) on Aspen refrigerant evaporator unit, model CC6004A-2ASL-05S utilizing R-410A refrigerant. Parts have been ordered for follow-up replacement requiring approximately half-day installation time, with system currently in non-operational status until repair completion.
Boonville, IN 47601
Completed on-site estimate for 40-gallon gas water heater replacement. Assessed existing A.O. Smith Signature gas water heater located in utility area with tile flooring, noting current copper piping connections and brass fittings. Documented exterior venting system including light blue PVC pipe extending through landscaped area near building foundation. Photographed unit specifications, energy rating labels, and current installation configuration to provide comprehensive replacement estimate. Confirmed gas fuel type and verified accessibility for future installation work.
Completed on-site estimate for 40-gallon gas water heater replacement. Assessed existing A.O. Smith Signature gas water heater located in utility area with tile flooring, noting current copper piping connections and brass fittings. Documented exterior venting system including light blue PVC pipe extending through landscaped area near building foundation. Photographed unit specifications, energy rating labels, and current installation configuration to provide comprehensive replacement estimate. Confirmed gas fuel type and verified accessibility for future installation work.
Kyle D.
Kyle D. Checked in
Completed on-site estimate for 40-gallon gas water heater replacement. Assessed existing A.O. Smith Signature gas water heater located in utility area with tile flooring, noting current copper piping connections and brass fittings. Documented exterior venting system including light blue PVC pipe extending through landscaped area near building foundation. Photographed unit specifications, energy rating labels, and current installation configuration to provide comprehensive replacement estimate. Confirmed gas fuel type and verified accessibility for future installation work.
Boonville, IN 47601
Boonville, IN - Completed Platinum Level maintenance on a 7-year-old residential HVAC system, including comprehensive inspection of furnace unit, ductwork, and associated components. Verified proper operation of all system controls, checked PVC condensate drainage, inspected sheet metal ductwork connections, and documented equipment condition with photographs. System found operating within normal parameters with no immediate service needs identified.
Cameron N.
Cameron N. Checked in
Completed Platinum Level maintenance on a 7-year-old residential HVAC system, including comprehensive inspection of furnace unit, ductwork, and associated components. Verified proper operation of all system controls, checked PVC condensate drainage, inspected sheet metal ductwork connections, and documented equipment condition with photographs. System found operating within normal parameters with no immediate service needs identified.
Boonville, IN 47601
Boonville, IN - Responded to no cooling complaint on 10+ year old Carrier Infinity system. Diagnosed failed evaporator coil and TXV requiring replacement. System also displaying multiple fault codes including outdoor air temperature sensor fault (93) and heater control fault (57). Parts ordered for follow-up repair appointment estimated at half-day duration.
Danny M.
Danny M. Checked in
Responded to no cooling complaint on 10+ year old Carrier Infinity system. Diagnosed failed evaporator coil and TXV requiring replacement. System also displaying multiple fault codes including outdoor air temperature sensor fault (93) and heater control fault (57). Parts ordered for follow-up repair appointment estimated at half-day duration.
Boonville, IN 47601
Completed second Platinum Level planned maintenance visit on dual-system HVAC installation, both units approximately 2 years old. Performed comprehensive inspection and servicing of both systems, including filter replacement with 20x25x5 filter for downstairs unit and 16x25x5 filter for upstairs unit. Inspected evaporator coil assembly on indoor air handler, noting significant dust and debris accumulation on aluminum fins requiring attention. Checked refrigerant lines, condensate drain system with PVC piping, and verified proper operation of drain pan and connections. Examined outdoor condenser unit electrical components, including capacitor, contactors, and associated wiring connections. All electrical connections inspected and found secure with proper wire routing. Verified system operation and completed routine maintenance procedures per Platinum Level service protocol.
Completed second Platinum Level planned maintenance visit on dual-system HVAC installation, both units approximately 2 years old. Performed comprehensive inspection and servicing of both systems, including filter replacement with 20x25x5 filter for downstairs unit and 16x25x5 filter for upstairs unit. Inspected evaporator coil assembly on indoor air handler, noting significant dust and debris accumulation on aluminum fins requiring attention. Checked refrigerant lines, condensate drain system with PVC piping, and verified proper operation of drain pan and connections. Examined outdoor condenser unit electrical components, including capacitor, contactors, and associated wiring connections. All electrical connections inspected and found secure with proper wire routing. Verified system operation and completed routine maintenance procedures per Platinum Level service protocol.
Michael H.
Michael H. Checked in
Completed second Platinum Level planned maintenance visit on dual-system HVAC installation, both units approximately 2 years old. Performed comprehensive inspection and servicing of both systems, including filter replacement with 20x25x5 filter for downstairs unit and 16x25x5 filter for upstairs unit. Inspected evaporator coil assembly on indoor air handler, noting significant dust and debris accumulation on aluminum fins requiring attention. Checked refrigerant lines, condensate drain system with PVC piping, and verified proper operation of drain pan and connections. Examined outdoor condenser unit electrical components, including capacitor, contactors, and associated wiring connections. All electrical connections inspected and found secure with proper wire routing. Verified system operation and completed routine maintenance procedures per Platinum Level service protocol.
Boonville, IN 47601
Installed a 40-gallon gas tall water heater (57 1/2" height x 21" width) in residential utility area. Unit was mounted on metal stand with proper venting system including flexible metallic ductwork and stainless steel exhaust assembly extending through ceiling penetration. Connected copper supply lines with brass compression fittings to existing plumbing infrastructure, installed white expansion tank with proper pressure relief configuration, and integrated system with existing water softener unit. All connections were secured and tested for proper operation. Installation includes 6-year parts and 1-year labor warranty.
Installed a 40-gallon gas tall water heater (57 1/2" height x 21" width) in residential utility area. Unit was mounted on metal stand with proper venting system including flexible metallic ductwork and stainless steel exhaust assembly extending through ceiling penetration. Connected copper supply lines with brass compression fittings to existing plumbing infrastructure, installed white expansion tank with proper pressure relief configuration, and integrated system with existing water softener unit. All connections were secured and tested for proper operation. Installation includes 6-year parts and 1-year labor warranty.
Kyle D.
Kyle D. Checked in
Installed a 40-gallon gas tall water heater (57 1/2" height x 21" width) in residential utility area. Unit was mounted on metal stand with proper venting system including flexible metallic ductwork and stainless steel exhaust assembly extending through ceiling penetration. Connected copper supply lines with brass compression fittings to existing plumbing infrastructure, installed white expansion tank with proper pressure relief configuration, and integrated system with existing water softener unit. All connections were secured and tested for proper operation. Installation includes 6-year parts and 1-year labor warranty.
Boonville, IN 47601
Boonville, IN - Responded to service call for air conditioning unit experiencing water leak while maintaining cooling operation. Upon inspection of the 6-year-old outdoor condenser unit, identified and resolved drainage issue. System tested and confirmed operating properly with no active leakage present at time of departure.
Craig U.
Craig U. Checked in
Responded to service call for air conditioning unit experiencing water leak while maintaining cooling operation. Upon inspection of the 6-year-old outdoor condenser unit, identified and resolved drainage issue. System tested and confirmed operating properly with no active leakage present at time of departure.
Boonville, IN 47601
Completed annual planned maintenance visit on 8-year-old residential HVAC system. Performed comprehensive inspection of furnace unit with all access panels removed to evaluate internal components, electrical connections, and control systems. Inspected blower motor assembly, gas valve mechanisms, and associated brass fittings for proper operation. Evaluated circuit boards and control modules for signs of wear or malfunction. Examined all wiring harnesses, electrical connections, and safety switches throughout upper and lower compartments. Checked PVC condensate drainage and venting lines, copper refrigerant lines, and flexible electrical conduit connections. Assessed overall system condition including minor dust accumulation on internal components. Verified 16x25x5 filter size for future maintenance requirements. Documented system condition through photographic records showing internal components, electrical systems, and installation configuration. Unit operating within normal parameter
Completed annual planned maintenance visit on 8-year-old residential HVAC system. Performed comprehensive inspection of furnace unit with all access panels removed to evaluate internal components, electrical connections, and control systems. Inspected blower motor assembly, gas valve mechanisms, and associated brass fittings for proper operation. Evaluated circuit boards and control modules for signs of wear or malfunction. Examined all wiring harnesses, electrical connections, and safety switches throughout upper and lower compartments. Checked PVC condensate drainage and venting lines, copper refrigerant lines, and flexible electrical conduit connections. Assessed overall system condition including minor dust accumulation on internal components. Verified 16x25x5 filter size for future maintenance requirements. Documented system condition through photographic records showing internal components, electrical systems, and installation configuration. Unit operating within normal parameter
Christian C.
Christian C. Checked in
Completed annual planned maintenance visit on 8-year-old residential HVAC system. Performed comprehensive inspection of furnace unit with all access panels removed to evaluate internal components, electrical connections, and control systems. Inspected blower motor assembly, gas valve mechanisms, and associated brass fittings for proper operation. Evaluated circuit boards and control modules for signs of wear or malfunction. Examined all wiring harnesses, electrical connections, and safety switches throughout upper and lower compartments. Checked PVC condensate drainage and venting lines, copper refrigerant lines, and flexible electrical conduit connections. Assessed overall system condition including minor dust accumulation on internal components. Verified 16x25x5 filter size for future maintenance requirements. Documented system condition through photographic records showing internal components, electrical systems, and installation configuration. Unit operating within normal parameter
Boonville, IN 47601
Boonville, IN - Performed routine preventive maintenance on Goodman brand furnace system. Accessed unit interior, inspected blower motor assembly, control board wiring connections, and condensate drainage lines. All components found operating within normal parameters with no issues requiring correction at this time.
Christian C.
Christian C. Checked in
Performed routine preventive maintenance on Goodman brand furnace system. Accessed unit interior, inspected blower motor assembly, control board wiring connections, and condensate drainage lines. All components found operating within normal parameters with no issues requiring correction at this time.
Boonville, IN 47601
Responded to no-cooling call on 19-year-old residential HVAC system with frozen evaporator coil. Upon arrival, unit was shut down with indoor temperature at 79°F. Conducted diagnostic evaluation of outdoor condenser unit and attic-mounted air handler to identify cause of coil freeze-up. Inspected refrigerant lines, airflow components, and electrical connections on aging equipment. Documented system condition with photographic evidence showing outdoor condenser unit mounted on concrete pad with associated electrical disconnect and indoor air handler with visible wear and dust accumulation. Advised homeowner on findings related to system age and performance issues affecting cooling capacity.
Responded to no-cooling call on 19-year-old residential HVAC system with frozen evaporator coil. Upon arrival, unit was shut down with indoor temperature at 79°F. Conducted diagnostic evaluation of outdoor condenser unit and attic-mounted air handler to identify cause of coil freeze-up. Inspected refrigerant lines, airflow components, and electrical connections on aging equipment. Documented system condition with photographic evidence showing outdoor condenser unit mounted on concrete pad with associated electrical disconnect and indoor air handler with visible wear and dust accumulation. Advised homeowner on findings related to system age and performance issues affecting cooling capacity.
Shawn M.
Shawn M. Checked in
Responded to no-cooling call on 19-year-old residential HVAC system with frozen evaporator coil. Upon arrival, unit was shut down with indoor temperature at 79°F. Conducted diagnostic evaluation of outdoor condenser unit and attic-mounted air handler to identify cause of coil freeze-up. Inspected refrigerant lines, airflow components, and electrical connections on aging equipment. Documented system condition with photographic evidence showing outdoor condenser unit mounted on concrete pad with associated electrical disconnect and indoor air handler with visible wear and dust accumulation. Advised homeowner on findings related to system age and performance issues affecting cooling capacity.
Boonville, IN 47601
Boonville, IN - Completed Platinum Level maintenance on a 9-year-old Amana HVAC system located in crawlspace. Replaced UVC bulb as requested by customer and installed 20x20x4 filter. Performed comprehensive system inspection of outdoor condenser unit, verified electrical connections at meter box, and confirmed proper operation of all components.
Luke O.
Luke O. Checked in
Completed Platinum Level maintenance on a 9-year-old Amana HVAC system located in crawlspace. Replaced UVC bulb as requested by customer and installed 20x20x4 filter. Performed comprehensive system inspection of outdoor condenser unit, verified electrical connections at meter box, and confirmed proper operation of all components.
Boonville, IN 47601
Completed installation of a 4-ton, 19 SEER heat pump system with matching air handler. The outdoor condensing unit was properly positioned on a concrete pad against the building foundation with appropriate clearances, electrical disconnect installed and wired per code, and refrigerant lines connected and tested for proper operation.
Completed installation of a 4-ton, 19 SEER heat pump system with matching air handler. The outdoor condensing unit was properly positioned on a concrete pad against the building foundation with appropriate clearances, electrical disconnect installed and wired per code, and refrigerant lines connected and tested for proper operation.
Cole B.
Cole B. Checked in
Completed installation of a 4-ton, 19 SEER heat pump system with matching air handler. The outdoor condensing unit was properly positioned on a concrete pad against the building foundation with appropriate clearances, electrical disconnect installed and wired per code, and refrigerant lines connected and tested for proper operation.
Boonville, IN 47601
Completed Platinum Level maintenance on a 2-year-old Lennox packaged HVAC unit. Performed comprehensive system inspection, replaced 16x20x1 air filter, verified thermostat operation showing 68°F setpoint in cooling mode, and confirmed all equipment functioning properly with no issues identified.
Completed Platinum Level maintenance on a 2-year-old Lennox packaged HVAC unit. Performed comprehensive system inspection, replaced 16x20x1 air filter, verified thermostat operation showing 68°F setpoint in cooling mode, and confirmed all equipment functioning properly with no issues identified.
Jeremiah H.
Jeremiah H. Checked in
Completed Platinum Level maintenance on a 2-year-old Lennox packaged HVAC unit. Performed comprehensive system inspection, replaced 16x20x1 air filter, verified thermostat operation showing 68°F setpoint in cooling mode, and confirmed all equipment functioning properly with no issues identified.
Boonville, IN 47601
Boonville, IN - Completed annual Gold Level maintenance on 12-year-old residential HVAC system. Performed comprehensive inspection of outdoor condenser unit, verified proper airflow through louvered vents and protective grille mesh, checked refrigerant line connections and electrical conduit routing to ensure system integrity. Replaced 20x25x5 air filter as part of scheduled maintenance protocol. All components operating within normal parameters with no immediate service needs identified.
Francis I.
Francis I. Checked in
Completed annual Gold Level maintenance on 12-year-old residential HVAC system. Performed comprehensive inspection of outdoor condenser unit, verified proper airflow through louvered vents and protective grille mesh, checked refrigerant line connections and electrical conduit routing to ensure system integrity. Replaced 20x25x5 air filter as part of scheduled maintenance protocol. All components operating within normal parameters with no immediate service needs identified.
Boonville, IN 47601
Completed comprehensive Platinum Level planned maintenance on dual HVAC system with CFI configuration, three years in service. Performed thorough inspection of both indoor and outdoor units, including temperature differential measurements across supply and return registers using calibrated digital instrumentation. Verified system operation, checked refrigerant pressures, inspected electrical connections, cleaned condensate drains, and confirmed proper airflow throughout both zones to ensure optimal performance and efficiency.
Completed comprehensive Platinum Level planned maintenance on dual HVAC system with CFI configuration, three years in service. Performed thorough inspection of both indoor and outdoor units, including temperature differential measurements across supply and return registers using calibrated digital instrumentation. Verified system operation, checked refrigerant pressures, inspected electrical connections, cleaned condensate drains, and confirmed proper airflow throughout both zones to ensure optimal performance and efficiency.
Michael H.
Michael H. Checked in
Completed comprehensive Platinum Level planned maintenance on dual HVAC system with CFI configuration, three years in service. Performed thorough inspection of both indoor and outdoor units, including temperature differential measurements across supply and return registers using calibrated digital instrumentation. Verified system operation, checked refrigerant pressures, inspected electrical connections, cleaned condensate drains, and confirmed proper airflow throughout both zones to ensure optimal performance and efficiency.
Boonville, IN 47601
Completed scheduled tanked water heater flush on State brand unit as part of preventive maintenance plan. Coordinated arrival time with tenant, performed standard flush procedure to remove sediment buildup from tank bottom, inspected copper supply lines and pressure relief valve discharge tube for proper operation, and verified all connections remained secure. Unit operating efficiently with no leaks detected upon completion.
Completed scheduled tanked water heater flush on State brand unit as part of preventive maintenance plan. Coordinated arrival time with tenant, performed standard flush procedure to remove sediment buildup from tank bottom, inspected copper supply lines and pressure relief valve discharge tube for proper operation, and verified all connections remained secure. Unit operating efficiently with no leaks detected upon completion.
Kyle D.
Kyle D. Checked in
Completed scheduled tanked water heater flush on State brand unit as part of preventive maintenance plan. Coordinated arrival time with tenant, performed standard flush procedure to remove sediment buildup from tank bottom, inspected copper supply lines and pressure relief valve discharge tube for proper operation, and verified all connections remained secure. Unit operating efficiently with no leaks detected upon completion.
Boonville, IN 47601
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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.

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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.