HVAC & Generators In Shepherdsville, KY | Heating & Air
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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HVAC & Generators in Shepherdsville, KY

Brand new AC condenser unit in front of wooden fence

With the average temps throughout the year ranging from 28 to 88 degrees in Shepherdsville, you need HVAC you can rely on. That’s where the team at A+ Derr Heating & Cooling steps in. Since 1975, we’ve been providing service to the Shepherdsville community. Our team carries decades of experience with homes just like yours.

You can schedule a time for A+ Derr to visit your home in Shepherdsville by contacting us online or calling (844) 577-9729.

Your Local Shepherdsville Heating Experts

When the cold rolls in, you can count on us to be there for you. We service various heating systems to help as many residents as possible. Our team offers heat pump, boiler, geothermal, and furnace replacement, repair, and maintenance services in Shepherdsville. Additionally, we offer emergency heating services when your heating system fails you in the bitter cold.Schedule an appointment with A+ Derr in no time. Call (844) 577-9729 to request service for your heating system.

Air Conditioning Services You Can Trust

A Kentucky home without a functioning air conditioner in the heat is an unlivable one. A+ Derr offers a full set of AC services for residents in Shepherdsville, KY. Our AC services include the following:

On top of traditional cooling services, we’re also here for you during emergencies. If you find yourself stuck in the sweltering heat with no AC, the team at A+ Derr is here. Our emergency air conditioning repair services are there to prevent you from suffering from the heat.

Indoor Air Quality Specialists

An important aspect of your home’s health is the indoor air quality. Our indoor air quality services include the following:

  • Duct cleaning: Harmful allergens and pollutants build up in ductwork, so it’s important to get your ducts cleaned regularly.
  • Air purifiers: Ensuring that your breathing air stays safe, an air purifier will go a long way to keep your home safe.
  • Humidifiers: Sometimes, your home can become too dry and cause the air to become irritable.
  • Dehumidifiers: Dehumidifiers are a great option to remove excess moisture and prevent mold.

If you want to see how indoor air quality services can improve your home, call (844) 577-9729 to request an appointment with A+ Derr.

Home Generator Services

A great way to improve your home’s stability is by installing a Generac generator. With the severe weather that rolls through the Kentuckian region, power outages are something every homeowner has to consider. But when you let us install a Generac generator in your home, you won’t have to worry about losing power.

Why Choose Us?

For nearly 50 years, the team at A+ Derr Heating & Cooling has provided outstanding work to residents throughout the Kentuckian region. On top of glowing reviews, every job we do has a 100% satisfaction guarantee. After all, you deserve the best for your home’s HVAC system.

Schedule HVAC or generator services for your Shepherdsville home today. Contact A+ Derr online or call (844) 577-9729.

Recent Jobs and Reviews in Shepherdsville, KY

Job Locations and Reviews

Responded to service call for non-operational heat pump system. Upon arrival, accessed the unit's control board and performed diagnostic testing of the electronic components and control circuits. Inspected the printed circuit board, relay switches, and terminal connections, documenting the condition of all wiring and control components with detailed photographs. Verified proper voltage at terminal blocks and confirmed all wire connections were secure at the control board interface. System was successfully restored to operational status and tested for proper heating function.
Responded to service call for non-operational heat pump system. Upon arrival, accessed the unit's control board and performed diagnostic testing of the electronic components and control circuits. Inspected the printed circuit board, relay switches, and terminal connections, documenting the condition of all wiring and control components with detailed photographs. Verified proper voltage at terminal blocks and confirmed all wire connections were secure at the control board interface. System was successfully restored to operational status and tested for proper heating function.
Brandon H.
Brandon H. Checked in
Responded to service call for non-operational heat pump system. Upon arrival, accessed the unit's control board and performed diagnostic testing of the electronic components and control circuits. Inspected the printed circuit board, relay switches, and terminal connections, documenting the condition of all wiring and control components with detailed photographs. Verified proper voltage at terminal blocks and confirmed all wire connections were secure at the control board interface. System was successfully restored to operational status and tested for proper heating function.
Shepherdsville, KY 40165
# HVAC Install - Complete System

Successfully completed full system installation including outdoor condensing unit and associated components. Performed comprehensive system commissioning and diagnostics using professional-grade instrumentation. Utilized digital manifold gauge to verify refrigerant pressures and system operating parameters, confirming proper charge levels with readings of 123.0 PSI and 256 PSI on respective service ports. Connected yellow, red, and blue refrigerant hoses to outdoor unit for accurate pressure testing and system evaluation.

Conducted temperature verification at supply ductwork, recording 55.4°F discharge air temperature to confirm proper cooling performance and system efficiency. All measurements taken with calibrated digital instruments to ensure accuracy and compliance with manufacturer specifications. System operating within normal parameters for optimal performance and energy efficiency.
# HVAC Install - Complete System

Successfully completed full system installation including outdoor condensing unit and associated components. Performed comprehensive system commissioning and diagnostics using professional-grade instrumentation. Utilized digital manifold gauge to verify refrigerant pressures and system operating parameters, confirming proper charge levels with readings of 123.0 PSI and 256 PSI on respective service ports. Connected yellow, red, and blue refrigerant hoses to outdoor unit for accurate pressure testing and system evaluation.

Conducted temperature verification at supply ductwork, recording 55.4°F discharge air temperature to confirm proper cooling performance and system efficiency. All measurements taken with calibrated digital instruments to ensure accuracy and compliance with manufacturer specifications. System operating within normal parameters for optimal performance and energy efficiency.
Tanner E.
Tanner E. Checked in
# HVAC Install - Complete System Successfully completed full system installation including outdoor condensing unit and associated components. Performed comprehensive system commissioning and diagnostics using professional-grade instrumentation. Utilized digital manifold gauge to verify refrigerant pressures and system operating parameters, confirming proper charge levels with readings of 123.0 PSI and 256 PSI on respective service ports. Connected yellow, red, and blue refrigerant hoses to outdoor unit for accurate pressure testing and system evaluation. Conducted temperature verification at supply ductwork, recording 55.4°F discharge air temperature to confirm proper cooling performance and system efficiency. All measurements taken with calibrated digital instruments to ensure accuracy and compliance with manufacturer specifications. System operating within normal parameters for optimal performance and energy efficiency.
Shepherdsville, KY 40165
# HVAC System Evaluation and Replacement Estimate

Responded to service call for air conditioning system not cooling adequately. Upon arrival, evaluated a 10-year-old residential HVAC system consisting of a forced-air furnace with integrated cooling capabilities located in the utility area. Performed comprehensive assessment of the existing equipment, which showed signs of age-related decline in cooling performance while maintaining partial heating and cooling function. Documented current system configuration including gray metal furnace unit with standard ductwork connections and ventilation components. Photographed equipment specifications, manufacturer labels, and overall installation layout for estimate preparation. Based on system age, declining performance, and inspection findings, provided detailed replacement estimate to homeowner outlining options for new high-efficiency HVAC equipment installation to restore full cooling capacity and improve energy efficiency.
# HVAC System Evaluation and Replacement Estimate

Responded to service call for air conditioning system not cooling adequately. Upon arrival, evaluated a 10-year-old residential HVAC system consisting of a forced-air furnace with integrated cooling capabilities located in the utility area. Performed comprehensive assessment of the existing equipment, which showed signs of age-related decline in cooling performance while maintaining partial heating and cooling function. Documented current system configuration including gray metal furnace unit with standard ductwork connections and ventilation components. Photographed equipment specifications, manufacturer labels, and overall installation layout for estimate preparation. Based on system age, declining performance, and inspection findings, provided detailed replacement estimate to homeowner outlining options for new high-efficiency HVAC equipment installation to restore full cooling capacity and improve energy efficiency.
Anthony L.
Anthony L. Checked in
# HVAC System Evaluation and Replacement Estimate Responded to service call for air conditioning system not cooling adequately. Upon arrival, evaluated a 10-year-old residential HVAC system consisting of a forced-air furnace with integrated cooling capabilities located in the utility area. Performed comprehensive assessment of the existing equipment, which showed signs of age-related decline in cooling performance while maintaining partial heating and cooling function. Documented current system configuration including gray metal furnace unit with standard ductwork connections and ventilation components. Photographed equipment specifications, manufacturer labels, and overall installation layout for estimate preparation. Based on system age, declining performance, and inspection findings, provided detailed replacement estimate to homeowner outlining options for new high-efficiency HVAC equipment installation to restore full cooling capacity and improve energy efficiency.
Shepherdsville, KY 40165
# HVAC Service Report - No Cool Condition

Responded to service call for 10-year-old residential air conditioning system with inadequate cooling performance. Upon arrival, performed comprehensive system diagnostic on split-system air conditioner to identify root cause of reduced cooling capacity.

Conducted visual inspection of indoor air handler unit and verified proper airflow through supply and return ductwork. Checked furnace blower operation and confirmed adequate air movement through the system. Inspected indoor coil access and surrounding components for visible issues.

Proceeded to outdoor condensing unit for detailed performance assessment. Connected manifold gauge set to service ports and recorded system pressures and temperatures. Measured refrigerant charge levels and compared readings against manufacturer specifications. Evaluated compressor amperage draw and verified proper electrical supply to unit via disconnect box.

Performed temperature differential measurements acro
# HVAC Service Report - No Cool Condition

Responded to service call for 10-year-old residential air conditioning system with inadequate cooling performance. Upon arrival, performed comprehensive system diagnostic on split-system air conditioner to identify root cause of reduced cooling capacity.

Conducted visual inspection of indoor air handler unit and verified proper airflow through supply and return ductwork. Checked furnace blower operation and confirmed adequate air movement through the system. Inspected indoor coil access and surrounding components for visible issues.

Proceeded to outdoor condensing unit for detailed performance assessment. Connected manifold gauge set to service ports and recorded system pressures and temperatures. Measured refrigerant charge levels and compared readings against manufacturer specifications. Evaluated compressor amperage draw and verified proper electrical supply to unit via disconnect box.

Performed temperature differential measurements acro
Anthony L.
Anthony L. Checked in
# HVAC Service Report - No Cool Condition Responded to service call for 10-year-old residential air conditioning system with inadequate cooling performance. Upon arrival, performed comprehensive system diagnostic on split-system air conditioner to identify root cause of reduced cooling capacity. Conducted visual inspection of indoor air handler unit and verified proper airflow through supply and return ductwork. Checked furnace blower operation and confirmed adequate air movement through the system. Inspected indoor coil access and surrounding components for visible issues. Proceeded to outdoor condensing unit for detailed performance assessment. Connected manifold gauge set to service ports and recorded system pressures and temperatures. Measured refrigerant charge levels and compared readings against manufacturer specifications. Evaluated compressor amperage draw and verified proper electrical supply to unit via disconnect box. Performed temperature differential measurements acro
Shepherdsville, KY 40165
Responded to a callback for system non-operation following previous maintenance visit. Inspected thermostat showing "OFF" status with ambient temperature reading of 61°. Used diagnostic probe to test control board connections and verified proper wiring configuration. System restored to normal operation after resolving control signal issue.
Responded to a callback for system non-operation following previous maintenance visit. Inspected thermostat showing "OFF" status with ambient temperature reading of 61°. Used diagnostic probe to test control board connections and verified proper wiring configuration. System restored to normal operation after resolving control signal issue.
Anthony L.
Anthony L. Checked in
Responded to a callback for system non-operation following previous maintenance visit. Inspected thermostat showing "OFF" status with ambient temperature reading of 61°. Used diagnostic probe to test control board connections and verified proper wiring configuration. System restored to normal operation after resolving control signal issue.
Shepherdsville, KY 40165
Responded to callback regarding thermostat error indicating system ran for 5 hours with temperature drop. Inspected wiring connections at control panel and examined internal components of the HVAC unit. Verified proper terminal connections and inspected circuit board functionality to resolve the temperature regulation issue.
Responded to callback regarding thermostat error indicating system ran for 5 hours with temperature drop. Inspected wiring connections at control panel and examined internal components of the HVAC unit. Verified proper terminal connections and inspected circuit board functionality to resolve the temperature regulation issue.
Anthony L.
Anthony L. Checked in
Responded to callback regarding thermostat error indicating system ran for 5 hours with temperature drop. Inspected wiring connections at control panel and examined internal components of the HVAC unit. Verified proper terminal connections and inspected circuit board functionality to resolve the temperature regulation issue.
Shepherdsville, KY 40165
Installed furnace concentric kit requiring roof access to modify existing exhaust venting system. Properly sealed PVC pipe penetration with roofing cement to ensure weatherproof installation. Part has been ordered to complete the repair; system currently operational with green priority status.
Installed furnace concentric kit requiring roof access to modify existing exhaust venting system. Properly sealed PVC pipe penetration with roofing cement to ensure weatherproof installation. Part has been ordered to complete the repair; system currently operational with green priority status.
Tanner E.
Tanner E. Checked in
Installed furnace concentric kit requiring roof access to modify existing exhaust venting system. Properly sealed PVC pipe penetration with roofing cement to ensure weatherproof installation. Part has been ordered to complete the repair; system currently operational with green priority status.
Shepherdsville, KY 40165
Conducted scheduled platinum-level monthly maintenance on system, including inspection of electrical components with readings taken using Fieldpiece SC260 multimeter showing values of 44.1 and 455. Noted filter size 16x20x5 requires replacement per 6-year maintenance schedule, with part currently on order to complete service at follow-up visit.
Conducted scheduled platinum-level monthly maintenance on system, including inspection of electrical components with readings taken using Fieldpiece SC260 multimeter showing values of 44.1 and 455. Noted filter size 16x20x5 requires replacement per 6-year maintenance schedule, with part currently on order to complete service at follow-up visit.
Tanner E.
Tanner E. Checked in
Conducted scheduled platinum-level monthly maintenance on system, including inspection of electrical components with readings taken using Fieldpiece SC260 multimeter showing values of 44.1 and 455. Noted filter size 16x20x5 requires replacement per 6-year maintenance schedule, with part currently on order to complete service at follow-up visit.
Shepherdsville, KY 40165
Performed follow-up inspection of previously repaired ductwork to address insufficient airflow in living room vent. Examined black insulated flexible ducts in crawl space, noting areas of damaged insulation with protruding fiberglass fibers. Identified restriction in airflow causing cool air delivery despite previous repair work.
Performed follow-up inspection of previously repaired ductwork to address insufficient airflow in living room vent. Examined black insulated flexible ducts in crawl space, noting areas of damaged insulation with protruding fiberglass fibers. Identified restriction in airflow causing cool air delivery despite previous repair work.
Tanner E.
Tanner E. Checked in
Performed follow-up inspection of previously repaired ductwork to address insufficient airflow in living room vent. Examined black insulated flexible ducts in crawl space, noting areas of damaged insulation with protruding fiberglass fibers. Identified restriction in airflow causing cool air delivery despite previous repair work.
Shepherdsville, KY 40165
Responded to no-heat call for a 6-year-old system still under 10-year warranty. Diagnosed furnace issue in crawlspace where unit was blowing air but not producing heat. Repaired faulty ignition component and verified proper system operation, restoring heat to the home which had dropped to 60°F.
Responded to no-heat call for a 6-year-old system still under 10-year warranty. Diagnosed furnace issue in crawlspace where unit was blowing air but not producing heat. Repaired faulty ignition component and verified proper system operation, restoring heat to the home which had dropped to 60°F.
Jordyn R.
Jordyn R. Checked in
Responded to no-heat call for a 6-year-old system still under 10-year warranty. Diagnosed furnace issue in crawlspace where unit was blowing air but not producing heat. Repaired faulty ignition component and verified proper system operation, restoring heat to the home which had dropped to 60°F.
Shepherdsville, KY 40165
Conducted annual Platinum Level maintenance on 2-year-old HVAC system. Performed electrical testing using multimeter (reading 23.6) and inspected furnace unit and water heater connections. Replaced 16x20x5 filter during this second maintenance visit; customer renewed service agreement.
Conducted annual Platinum Level maintenance on 2-year-old HVAC system. Performed electrical testing using multimeter (reading 23.6) and inspected furnace unit and water heater connections. Replaced 16x20x5 filter during this second maintenance visit; customer renewed service agreement.
Victor W.
Victor W. Checked in
Conducted annual Platinum Level maintenance on 2-year-old HVAC system. Performed electrical testing using multimeter (reading 23.6) and inspected furnace unit and water heater connections. Replaced 16x20x5 filter during this second maintenance visit; customer renewed service agreement.
Shepherdsville, KY 40165
Installed new flexible ductwork in sizes 6", 7", and 8", along with 10' of 4"-26 gauge metal pipe and two 4"-26 gauge elbows. Secured metal ductwork to joists with proper supports and sealed connections with metallic foil tape. Additionally installed white dryer vent cap on exterior wall to complete the ventilation system.
Installed new flexible ductwork in sizes 6", 7", and 8", along with 10' of 4"-26 gauge metal pipe and two 4"-26 gauge elbows. Secured metal ductwork to joists with proper supports and sealed connections with metallic foil tape. Additionally installed white dryer vent cap on exterior wall to complete the ventilation system.
Tanner E.
Tanner E. Checked in
Installed new flexible ductwork in sizes 6", 7", and 8", along with 10' of 4"-26 gauge metal pipe and two 4"-26 gauge elbows. Secured metal ductwork to joists with proper supports and sealed connections with metallic foil tape. Additionally installed white dryer vent cap on exterior wall to complete the ventilation system.
Shepherdsville, KY 40165
Completed annual platinum-level maintenance on 1-year-old HVAC system during second scheduled visit. Performed comprehensive electrical diagnostics using multimeter and clamp meter to verify proper voltage readings and amperage draw (23.5A), with particular focus on circuit board functionality and connection integrity. Replaced air filter, renewed service agreement, and collected necessary documentation.
Completed annual platinum-level maintenance on 1-year-old HVAC system during second scheduled visit. Performed comprehensive electrical diagnostics using multimeter and clamp meter to verify proper voltage readings and amperage draw (23.5A), with particular focus on circuit board functionality and connection integrity. Replaced air filter, renewed service agreement, and collected necessary documentation.
Victor W.
Victor W. Checked in
Completed annual platinum-level maintenance on 1-year-old HVAC system during second scheduled visit. Performed comprehensive electrical diagnostics using multimeter and clamp meter to verify proper voltage readings and amperage draw (23.5A), with particular focus on circuit board functionality and connection integrity. Replaced air filter, renewed service agreement, and collected necessary documentation.
Shepherdsville, KY 40165
Diagnosed failed compressor (ZP31LXEPFV800) in outdoor unit requiring replacement. Ordered compressor and liquid line drier for system repair. Will perform vacuum service and recharge with R-410A refrigerant upon part arrival to restore cooling operation.
Diagnosed failed compressor (ZP31LXEPFV800) in outdoor unit requiring replacement. Ordered compressor and liquid line drier for system repair. Will perform vacuum service and recharge with R-410A refrigerant upon part arrival to restore cooling operation.
Charlie M.
Charlie M. Checked in
Diagnosed failed compressor (ZP31LXEPFV800) in outdoor unit requiring replacement. Ordered compressor and liquid line drier for system repair. Will perform vacuum service and recharge with R-410A refrigerant upon part arrival to restore cooling operation.
Shepherdsville, KY 40165
Completed platinum level maintenance service on a 1-year-old Lennox HVAC system (3rd annual visit). Replaced 20x20x5 filter, performed system inspection, and verified proper electrical operation with amp readings measuring 66.3 on the Klein Tools meter. System is functioning within normal parameters with indicator lights showing proper operation.
Completed platinum level maintenance service on a 1-year-old Lennox HVAC system (3rd annual visit). Replaced 20x20x5 filter, performed system inspection, and verified proper electrical operation with amp readings measuring 66.3 on the Klein Tools meter. System is functioning within normal parameters with indicator lights showing proper operation.
Victor W.
Victor W. Checked in
Completed platinum level maintenance service on a 1-year-old Lennox HVAC system (3rd annual visit). Replaced 20x20x5 filter, performed system inspection, and verified proper electrical operation with amp readings measuring 66.3 on the Klein Tools meter. System is functioning within normal parameters with indicator lights showing proper operation.
Shepherdsville, KY 40165
Performed scheduled annual maintenance on 8-year-old HVAC system with 16x25x5 filter. Conducted comprehensive electrical testing using Klein Tools CL800 clamp meter, measuring amp draw at 3.12 and inspecting all electrical connections. Verified proper operation of safety components including MET-SWITCH and examined wiring integrity throughout system.
Performed scheduled annual maintenance on 8-year-old HVAC system with 16x25x5 filter. Conducted comprehensive electrical testing using Klein Tools CL800 clamp meter, measuring amp draw at 3.12 and inspecting all electrical connections. Verified proper operation of safety components including MET-SWITCH and examined wiring integrity throughout system.
Victor W.
Victor W. Checked in
Performed scheduled annual maintenance on 8-year-old HVAC system with 16x25x5 filter. Conducted comprehensive electrical testing using Klein Tools CL800 clamp meter, measuring amp draw at 3.12 and inspecting all electrical connections. Verified proper operation of safety components including MET-SWITCH and examined wiring integrity throughout system.
Shepherdsville, KY 40165
Conducted platinum level maintenance on a 2-year-old system experiencing intermittent short cycling. Performed comprehensive diagnostics including electrical testing with clamp meter on the outdoor condenser unit, and replaced 20x20x2 filter as part of first annual service visit. System is now operating within normal parameters with no short cycling observed.
Conducted platinum level maintenance on a 2-year-old system experiencing intermittent short cycling. Performed comprehensive diagnostics including electrical testing with clamp meter on the outdoor condenser unit, and replaced 20x20x2 filter as part of first annual service visit. System is now operating within normal parameters with no short cycling observed.
Anthony L.
Anthony L. Checked in
Conducted platinum level maintenance on a 2-year-old system experiencing intermittent short cycling. Performed comprehensive diagnostics including electrical testing with clamp meter on the outdoor condenser unit, and replaced 20x20x2 filter as part of first annual service visit. System is now operating within normal parameters with no short cycling observed.
Shepherdsville, KY 40165
Completed monthly Gold Level maintenance service on a 3-year-old HVAC system. Replaced 20x20x1 filter, inspected blower wheel assembly for proper operation, and performed temperature differential testing which showed readings within normal range. System is functioning properly with no issues detected.
Completed monthly Gold Level maintenance service on a 3-year-old HVAC system. Replaced 20x20x1 filter, inspected blower wheel assembly for proper operation, and performed temperature differential testing which showed readings within normal range. System is functioning properly with no issues detected.
Jordyn R.
Jordyn R. Checked in
Completed monthly Gold Level maintenance service on a 3-year-old HVAC system. Replaced 20x20x1 filter, inspected blower wheel assembly for proper operation, and performed temperature differential testing which showed readings within normal range. System is functioning properly with no issues detected.
Shepherdsville, KY 40165
Conducted site visit to evaluate thermostat relocation requirements. Identified optimal placement near the return air vent in living room as requested. Documented current thermostat location and proposed new location with photos for installation planning.
Conducted site visit to evaluate thermostat relocation requirements. Identified optimal placement near the return air vent in living room as requested. Documented current thermostat location and proposed new location with photos for installation planning.
Charlie M.
Charlie M. Checked in
Conducted site visit to evaluate thermostat relocation requirements. Identified optimal placement near the return air vent in living room as requested. Documented current thermostat location and proposed new location with photos for installation planning.
Shepherdsville, KY 40165
Completed scheduled Platinum Level maintenance on HVAC system with 16x20x5 filter. Verified proper thermostat operation, confirming temperature settings and programming functionality. Conducted temperature differential testing between supply and return air, with readings indicating system is performing within normal parameters.
Completed scheduled Platinum Level maintenance on HVAC system with 16x20x5 filter. Verified proper thermostat operation, confirming temperature settings and programming functionality. Conducted temperature differential testing between supply and return air, with readings indicating system is performing within normal parameters.
Anthony L.
Anthony L. Checked in
Completed scheduled Platinum Level maintenance on HVAC system with 16x20x5 filter. Verified proper thermostat operation, confirming temperature settings and programming functionality. Conducted temperature differential testing between supply and return air, with readings indicating system is performing within normal parameters.
Shepherdsville, KY 40165
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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.