HVAC & Generators in Bardstown, KY - A+ Derr Heating & Cooling
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 Bardstown, KY

Family-Operated Heating & Cooling Company

A+ Derr Heating & Cooling confronts all of the unique Kentucky climate challenges by offering tried and tested HVAC services from a team of trained technicians. We’re a fourth-generation family business with more than 50 years of experience.

Our impressive team and exceptional inventory allow us to bring you prompt, efficient solutions that last for your home in Bardstown. We even offer financing to make your journey more affordable.

24/7 Emergency Service (833) 232-4328 Schedule Service Schedule Service

Your Local Heating Experts

Bardstown has been experiencing some of its iciest weather in half a century, so you need an optimized HVAC system with exceptional venting. Without adequate heating, your pipes will freeze, your faucets will run dry, and your boiler will be rendered useless. A+ Derr’s exceptional technicians will make sure your home remains fully functional all year. We offer:

  • Heating installation: We install all heating technologies, from electric furnaces and boilers to geothermal heat pumps and ductless mini-splits. If your system is underperforming or breaking down frequently, we’ll assess whether a repair or replacement will suit your situation best.
  • Heating repair: Near-freezing weather is hazardous, so we provide 24/7 emergency repairs when your heating system lets you down.
  • Heating maintenance: Our maintenance plan includes repair discounts, two seasonal services, and 24-hour priority support.

Heat pump wall mount on a brick wall of a house

Air Conditioning Services You Can Trust

Bardstown’s muggy summers can strongly impact your productivity and quality of life. A+ Derr will get you through the season in absolute comfort. As a premier dealer for some of the finest air conditioners in the world, we can bring you unparalleled quality.

  • Air conditioning repair: With A+ Derr at your side, you’ll never endure a muggy day without air conditioning again. We’ll keep you covered with 24/7 emergency repairs.
  • Air conditioning replacement: We’re a family-owned business that promises old-fashioned customer service and replacement solutions that last. Our loyal clients can attest to it.
  • Air conditioning maintenance: Wear and tear can shorten your system’s service life, but regular maintenance can reverse all the damage of the previous season. Our preventative maintenance checklist is comprehensive enough to protect your investment.

Start your next HVAC project with A+ Derr in Bardstown by calling (844) 577-9729.

Indoor Air Quality Specialists

You spend over a third of your life at home, so your indoor air quality has a direct impact on your health. According to the EPA, some homes are more polluted than urban centers, but we’ve got you covered. We install and maintain:

  • Air purifiers: These innovative products can remove dander, allergens, and volatile inorganic compounds from your indoor environment. We’ll help you to choose the best filtration option for your health and pollution hazards.
  • Humidifiers: The correct humidity balance can improve respiratory symptoms while raising your “real feel” temperatures over the dry season.
  • Dehumidifiers: A whole-home system will overcome summer’s muggy weather while reducing the risk of household corrosion.
  • HVAC ductwork: Our team is thorough and precise. Regular duct cleaning will improve your air quality dramatically.

Home Generator Services

Outages can bring your life to a standstill, but A+ Derr will keep you moving. We install and maintain whole-home generators that keep the lights on during a blackout. We install Generac brand systems, which are known for their reliability and low maintenance. A standby generator will give you peace of mind, turning on automatically even when you aren’t home.

Why Choose A+ Derr?

A+ Derr’s technicians are experienced with all the best HVAC brands in the business. This makes them sharp diagnosticians who can track even the most obscure problems. We’re a Lennox Premier Dealer and member of the Air Conditioning Contractors of America. This certification is a promise of competent installation and maintenance practices. Our Heating and Maintenance Plan will create a more affordable and convenient HVAC experience. We are, after all, in the business of keeping our clients comfortable.Experience service excellence with A+ Derr in Bardstown. Call (844) 577-9729 to request HVAC or generator service.

Recent Jobs and Reviews in Bardstown, KY

Job Locations and Reviews

Responded to no-cooling complaint on 6-year-old residential air conditioning system with indoor temperature exceeding 90°F. Upon arrival, performed diagnostic evaluation using digital manifold gauges, which revealed critically low refrigerant pressures (21.1 PSI suction, 23.7 PSI discharge), indicating significant refrigerant loss in the system. Conducted thorough inspection of outdoor condensing unit and identified leak source. Repaired refrigerant leak, evacuated system to remove moisture and contaminants, and recharged unit to manufacturer specifications. Verified proper system operation with thermostat set to cooling mode at 80°F setpoint, confirming adequate airflow and temperature differential. System restored to full cooling capacity for elderly occupants, one with respiratory condition requiring climate-controlled environment.
Responded to no-cooling complaint on 6-year-old residential air conditioning system with indoor temperature exceeding 90°F. Upon arrival, performed diagnostic evaluation using digital manifold gauges, which revealed critically low refrigerant pressures (21.1 PSI suction, 23.7 PSI discharge), indicating significant refrigerant loss in the system. Conducted thorough inspection of outdoor condensing unit and identified leak source. Repaired refrigerant leak, evacuated system to remove moisture and contaminants, and recharged unit to manufacturer specifications. Verified proper system operation with thermostat set to cooling mode at 80°F setpoint, confirming adequate airflow and temperature differential. System restored to full cooling capacity for elderly occupants, one with respiratory condition requiring climate-controlled environment.
Jordyn R.
Jordyn R. Checked in
Responded to no-cooling complaint on 6-year-old residential air conditioning system with indoor temperature exceeding 90°F. Upon arrival, performed diagnostic evaluation using digital manifold gauges, which revealed critically low refrigerant pressures (21.1 PSI suction, 23.7 PSI discharge), indicating significant refrigerant loss in the system. Conducted thorough inspection of outdoor condensing unit and identified leak source. Repaired refrigerant leak, evacuated system to remove moisture and contaminants, and recharged unit to manufacturer specifications. Verified proper system operation with thermostat set to cooling mode at 80°F setpoint, confirming adequate airflow and temperature differential. System restored to full cooling capacity for elderly occupants, one with respiratory condition requiring climate-controlled environment.
Bardstown, KY 40004
Responded to no cooling complaint on two-year-old residential HVAC system with water accumulation reported at basement unit. Upon inspection, found significant debris accumulation, dirt, and organic matter inside air handler cabinet affecting system operation. Compressor and refrigerant lines showed proper connections, but interior surfaces displayed moisture-related deterioration and contamination. Outdoor condensing unit positioned on concrete pad with proper refrigerant line connections to building. System required cleaning and drainage assessment to restore proper cooling function and address water discharge issue.
Responded to no cooling complaint on two-year-old residential HVAC system with water accumulation reported at basement unit. Upon inspection, found significant debris accumulation, dirt, and organic matter inside air handler cabinet affecting system operation. Compressor and refrigerant lines showed proper connections, but interior surfaces displayed moisture-related deterioration and contamination. Outdoor condensing unit positioned on concrete pad with proper refrigerant line connections to building. System required cleaning and drainage assessment to restore proper cooling function and address water discharge issue.
Neal H.
Neal H. Checked in
Responded to no cooling complaint on two-year-old residential HVAC system with water accumulation reported at basement unit. Upon inspection, found significant debris accumulation, dirt, and organic matter inside air handler cabinet affecting system operation. Compressor and refrigerant lines showed proper connections, but interior surfaces displayed moisture-related deterioration and contamination. Outdoor condensing unit positioned on concrete pad with proper refrigerant line connections to building. System required cleaning and drainage assessment to restore proper cooling function and address water discharge issue.
Bardstown, KY 40004
Conducted follow-up site visit to document bathroom conditions and verify accessibility for pending HVAC installation work. Photographed existing bathroom layout, including shower enclosure, flooring, and wall conditions to assess clearances and identify any potential obstacles for equipment placement or ductwork routing.
Conducted follow-up site visit to document bathroom conditions and verify accessibility for pending HVAC installation work. Photographed existing bathroom layout, including shower enclosure, flooring, and wall conditions to assess clearances and identify any potential obstacles for equipment placement or ductwork routing.
Brandon H.
Brandon H. Checked in
Conducted follow-up site visit to document bathroom conditions and verify accessibility for pending HVAC installation work. Photographed existing bathroom layout, including shower enclosure, flooring, and wall conditions to assess clearances and identify any potential obstacles for equipment placement or ductwork routing.
Bardstown, KY 40004
Installed a new 40-gallon residential water heater in utility room, including proper connection of hot and cold water supply lines with copper piping and flexible connectors. Mounted blue expansion tank near ceiling, integrated all plumbing connections to code specifications, and verified proper operation of all safety features and shut-off valves.
Installed a new 40-gallon residential water heater in utility room, including proper connection of hot and cold water supply lines with copper piping and flexible connectors. Mounted blue expansion tank near ceiling, integrated all plumbing connections to code specifications, and verified proper operation of all safety features and shut-off valves.
Paul G.
Paul G. Checked in
Installed a new 40-gallon residential water heater in utility room, including proper connection of hot and cold water supply lines with copper piping and flexible connectors. Mounted blue expansion tank near ceiling, integrated all plumbing connections to code specifications, and verified proper operation of all safety features and shut-off valves.
Bardstown, KY 40004
Completed installation of geothermal HVAC system including black air handler unit with integrated components and gray water heater. Connected copper piping with brass fittings and valves between units, installed white PVC condensate drain line, and completed silver reflective ductwork with proper insulation and plenum transitions in mechanical room with tile flooring.
Completed installation of geothermal HVAC system including black air handler unit with integrated components and gray water heater. Connected copper piping with brass fittings and valves between units, installed white PVC condensate drain line, and completed silver reflective ductwork with proper insulation and plenum transitions in mechanical room with tile flooring.
Tanner E.
Tanner E. Checked in
Completed installation of geothermal HVAC system including black air handler unit with integrated components and gray water heater. Connected copper piping with brass fittings and valves between units, installed white PVC condensate drain line, and completed silver reflective ductwork with proper insulation and plenum transitions in mechanical room with tile flooring.
Bardstown, KY 40004
Responded to follow-up service call for system not cooling after previous service visit. Coordinated diagnostic assessment with technical team to evaluate persistent cooling issue and determine appropriate resolution path. Documented existing HVAC system conditions including hydronic heating components, air handler interior showing signs of moisture exposure and corrosion on drain pan, and refrigerant line connections for further diagnostic evaluation.
Responded to follow-up service call for system not cooling after previous service visit. Coordinated diagnostic assessment with technical team to evaluate persistent cooling issue and determine appropriate resolution path. Documented existing HVAC system conditions including hydronic heating components, air handler interior showing signs of moisture exposure and corrosion on drain pan, and refrigerant line connections for further diagnostic evaluation.
Neal H.
Neal H. Checked in
Responded to follow-up service call for system not cooling after previous service visit. Coordinated diagnostic assessment with technical team to evaluate persistent cooling issue and determine appropriate resolution path. Documented existing HVAC system conditions including hydronic heating components, air handler interior showing signs of moisture exposure and corrosion on drain pan, and refrigerant line connections for further diagnostic evaluation.
Bardstown, KY 40004
Completed annual platinum maintenance on a 2-year-old Lennox furnace system, including inspection of all major components and replacement of 20x25x5 filter. Documented system condition with photos showing typical dust accumulation on unit exterior and surrounding utility area, with all mechanical components functioning within normal parameters.
Completed annual platinum maintenance on a 2-year-old Lennox furnace system, including inspection of all major components and replacement of 20x25x5 filter. Documented system condition with photos showing typical dust accumulation on unit exterior and surrounding utility area, with all mechanical components functioning within normal parameters.
Neal H.
Neal H. Checked in
Completed annual platinum maintenance on a 2-year-old Lennox furnace system, including inspection of all major components and replacement of 20x25x5 filter. Documented system condition with photos showing typical dust accumulation on unit exterior and surrounding utility area, with all mechanical components functioning within normal parameters.
Bardstown, KY 40004
Responded to callback for recurring system leak following previous service visit. Upon arrival, inspected condensate drain system and discovered compromised drain line connections causing water accumulation on concrete floor. Evaluated condensate pump operation and drain pan assembly at air handler base. Identified improper trap configuration and potential blockage in PVC drain lines contributing to overflow condition. Documented water staining patterns on floor indicating ongoing drainage issue. Photographed condensate management system including pump, drain pan, and PVC piping assembly for further assessment and recommended corrective action to resolve persistent leakage problem.
Responded to callback for recurring system leak following previous service visit. Upon arrival, inspected condensate drain system and discovered compromised drain line connections causing water accumulation on concrete floor. Evaluated condensate pump operation and drain pan assembly at air handler base. Identified improper trap configuration and potential blockage in PVC drain lines contributing to overflow condition. Documented water staining patterns on floor indicating ongoing drainage issue. Photographed condensate management system including pump, drain pan, and PVC piping assembly for further assessment and recommended corrective action to resolve persistent leakage problem.
Neal H.
Neal H. Checked in
Responded to callback for recurring system leak following previous service visit. Upon arrival, inspected condensate drain system and discovered compromised drain line connections causing water accumulation on concrete floor. Evaluated condensate pump operation and drain pan assembly at air handler base. Identified improper trap configuration and potential blockage in PVC drain lines contributing to overflow condition. Documented water staining patterns on floor indicating ongoing drainage issue. Photographed condensate management system including pump, drain pan, and PVC piping assembly for further assessment and recommended corrective action to resolve persistent leakage problem.
Bardstown, KY 40004
Responded to water leak complaint at basement air handler unit approximately 1.25 years old. Upon arrival, observed active water leakage from base of furnace with saturated air filter and moisture infiltration through middle section of system. Opened lower access panel to inspect evaporator coil assembly and internal components. Identified source of water intrusion affecting refrigerant lines and internal cabinet. Utilized diagnostic equipment to assess system operation and leak origin. Documented internal mechanical components including serpentine refrigerant tubing, electrical connections, and coil assembly condition. System was operational at time of service with airflow present through vents.
Responded to water leak complaint at basement air handler unit approximately 1.25 years old. Upon arrival, observed active water leakage from base of furnace with saturated air filter and moisture infiltration through middle section of system. Opened lower access panel to inspect evaporator coil assembly and internal components. Identified source of water intrusion affecting refrigerant lines and internal cabinet. Utilized diagnostic equipment to assess system operation and leak origin. Documented internal mechanical components including serpentine refrigerant tubing, electrical connections, and coil assembly condition. System was operational at time of service with airflow present through vents.
Anthony L.
Anthony L. Checked in
Responded to water leak complaint at basement air handler unit approximately 1.25 years old. Upon arrival, observed active water leakage from base of furnace with saturated air filter and moisture infiltration through middle section of system. Opened lower access panel to inspect evaporator coil assembly and internal components. Identified source of water intrusion affecting refrigerant lines and internal cabinet. Utilized diagnostic equipment to assess system operation and leak origin. Documented internal mechanical components including serpentine refrigerant tubing, electrical connections, and coil assembly condition. System was operational at time of service with airflow present through vents.
Bardstown, KY 40004
Completed monthly platinum-level preventive maintenance on a 2-year-old Coleman HVAC system. Replaced 20x20x1 and 20x20x4 air filters, inspected air handler operation, and verified proper airflow throughout the system. Supply air temperature measured at 74.93°F at floor register, confirming adequate system performance and proper heating operation.
Completed monthly platinum-level preventive maintenance on a 2-year-old Coleman HVAC system. Replaced 20x20x1 and 20x20x4 air filters, inspected air handler operation, and verified proper airflow throughout the system. Supply air temperature measured at 74.93°F at floor register, confirming adequate system performance and proper heating operation.
Anthony L.
Anthony L. Checked in
Completed monthly platinum-level preventive maintenance on a 2-year-old Coleman HVAC system. Replaced 20x20x1 and 20x20x4 air filters, inspected air handler operation, and verified proper airflow throughout the system. Supply air temperature measured at 74.93°F at floor register, confirming adequate system performance and proper heating operation.
Bardstown, KY 40004
Responded to no cooling complaint on 6-year-old residential air conditioning system with adequate airflow but insufficient cooling. Upon inspection of outdoor condensing unit, diagnosed failed dual-run capacitor preventing compressor from operating properly. Replaced defective capacitor with OEM-equivalent component, verified proper voltage and amperage readings, and tested system operation. Unit now cooling effectively with compressor and condenser fan motor running within manufacturer specifications. Performed complete maintenance service including coil cleaning, refrigerant charge verification, and electrical connection inspection. Advised property owner to maintain clearance around outdoor unit due to excessive vegetation growth observed during service.
Responded to no cooling complaint on 6-year-old residential air conditioning system with adequate airflow but insufficient cooling. Upon inspection of outdoor condensing unit, diagnosed failed dual-run capacitor preventing compressor from operating properly. Replaced defective capacitor with OEM-equivalent component, verified proper voltage and amperage readings, and tested system operation. Unit now cooling effectively with compressor and condenser fan motor running within manufacturer specifications. Performed complete maintenance service including coil cleaning, refrigerant charge verification, and electrical connection inspection. Advised property owner to maintain clearance around outdoor unit due to excessive vegetation growth observed during service.
Anthony L.
Anthony L. Checked in
Responded to no cooling complaint on 6-year-old residential air conditioning system with adequate airflow but insufficient cooling. Upon inspection of outdoor condensing unit, diagnosed failed dual-run capacitor preventing compressor from operating properly. Replaced defective capacitor with OEM-equivalent component, verified proper voltage and amperage readings, and tested system operation. Unit now cooling effectively with compressor and condenser fan motor running within manufacturer specifications. Performed complete maintenance service including coil cleaning, refrigerant charge verification, and electrical connection inspection. Advised property owner to maintain clearance around outdoor unit due to excessive vegetation growth observed during service.
Bardstown, KY 40004
Completed comprehensive HVAC replacement estimate for 850 square foot residence requiring 2-ton, 14 SEER air conditioning system with 95-96 AFUE upflow gas furnace and evaporator coil replacement. Inspected existing outdoor condenser unit with visible aging and wear on copper coil components, assessed crawl space conditions revealing moisture concerns and existing ductwork configuration. Documented current system specifications and spatial requirements to provide accurate equipment sizing and installation recommendations for complete system replacement.
Completed comprehensive HVAC replacement estimate for 850 square foot residence requiring 2-ton, 14 SEER air conditioning system with 95-96 AFUE upflow gas furnace and evaporator coil replacement. Inspected existing outdoor condenser unit with visible aging and wear on copper coil components, assessed crawl space conditions revealing moisture concerns and existing ductwork configuration. Documented current system specifications and spatial requirements to provide accurate equipment sizing and installation recommendations for complete system replacement.
Brad C.
Brad C. Checked in
Completed comprehensive HVAC replacement estimate for 850 square foot residence requiring 2-ton, 14 SEER air conditioning system with 95-96 AFUE upflow gas furnace and evaporator coil replacement. Inspected existing outdoor condenser unit with visible aging and wear on copper coil components, assessed crawl space conditions revealing moisture concerns and existing ductwork configuration. Documented current system specifications and spatial requirements to provide accurate equipment sizing and installation recommendations for complete system replacement.
Bardstown, KY 40004
Completed routine complimentary air conditioning tune-up on a new system as part of scheduled preventive maintenance campaign. Performed comprehensive electrical inspection including contactor examination and amperage measurements, with all readings within manufacturer specifications. System operating properly with no deficiencies noted.
Completed routine complimentary air conditioning tune-up on a new system as part of scheduled preventive maintenance campaign. Performed comprehensive electrical inspection including contactor examination and amperage measurements, with all readings within manufacturer specifications. System operating properly with no deficiencies noted.
Jordyn R.
Jordyn R. Checked in
Completed routine complimentary air conditioning tune-up on a new system as part of scheduled preventive maintenance campaign. Performed comprehensive electrical inspection including contactor examination and amperage measurements, with all readings within manufacturer specifications. System operating properly with no deficiencies noted.
Bardstown, KY 40004
Completed annual platinum-level preventive maintenance on single HVAC system. Verified thermostat operation showing 68°F set point with cooling mode active to 63°F and 52% humidity level. Measured system amperage at 0.07A using clamp meter on outdoor unit, confirming proper electrical operation. Replaced both air filters per specifications (14x14x1 and 14x30x1). All components inspected and operating within normal parameters.
Completed annual platinum-level preventive maintenance on single HVAC system. Verified thermostat operation showing 68°F set point with cooling mode active to 63°F and 52% humidity level. Measured system amperage at 0.07A using clamp meter on outdoor unit, confirming proper electrical operation. Replaced both air filters per specifications (14x14x1 and 14x30x1). All components inspected and operating within normal parameters.
Anthony L.
Anthony L. Checked in
Completed annual platinum-level preventive maintenance on single HVAC system. Verified thermostat operation showing 68°F set point with cooling mode active to 63°F and 52% humidity level. Measured system amperage at 0.07A using clamp meter on outdoor unit, confirming proper electrical operation. Replaced both air filters per specifications (14x14x1 and 14x30x1). All components inspected and operating within normal parameters.
Bardstown, KY 40004
Responded to service call for leaking garbage disposal with water accumulation under sink. Upon inspection, identified active leak at disposal unit causing water damage to cabinet floor. Removed and replaced faulty garbage disposal unit, reconnected drain lines to existing P-trap assembly, and verified proper seal at all connection points. Tested system for leaks, confirmed proper drainage, and cleaned work area.
Responded to service call for leaking garbage disposal with water accumulation under sink. Upon inspection, identified active leak at disposal unit causing water damage to cabinet floor. Removed and replaced faulty garbage disposal unit, reconnected drain lines to existing P-trap assembly, and verified proper seal at all connection points. Tested system for leaks, confirmed proper drainage, and cleaned work area.
Paul G.
Paul G. Checked in
Responded to service call for leaking garbage disposal with water accumulation under sink. Upon inspection, identified active leak at disposal unit causing water damage to cabinet floor. Removed and replaced faulty garbage disposal unit, reconnected drain lines to existing P-trap assembly, and verified proper seal at all connection points. Tested system for leaks, confirmed proper drainage, and cleaned work area.
Bardstown, KY 40004
# Service Report

Responded to no-cool call on 15-year-old residential HVAC system with reported minimal airflow and outdoor unit failure to operate. Upon arrival, performed comprehensive system diagnostic including electrical testing, refrigerant pressure analysis, and airflow assessment. Identified failed compressor contactor preventing outdoor condenser unit from engaging. Replaced defective contactor and verified proper electrical connections throughout system. Inspected condenser coils showing moderate debris accumulation and weathering consistent with system age; cleaned coils to restore optimal heat transfer efficiency. Tested system operation through complete cooling cycle, confirming outdoor unit engagement, proper compressor function, and restored airflow at supply registers. System operating within manufacturer specifications at time of departure. Advised customer of system age and recommended monitoring for future component wear given visible corrosion on refrigerant lines
# Service Report

Responded to no-cool call on 15-year-old residential HVAC system with reported minimal airflow and outdoor unit failure to operate. Upon arrival, performed comprehensive system diagnostic including electrical testing, refrigerant pressure analysis, and airflow assessment. Identified failed compressor contactor preventing outdoor condenser unit from engaging. Replaced defective contactor and verified proper electrical connections throughout system. Inspected condenser coils showing moderate debris accumulation and weathering consistent with system age; cleaned coils to restore optimal heat transfer efficiency. Tested system operation through complete cooling cycle, confirming outdoor unit engagement, proper compressor function, and restored airflow at supply registers. System operating within manufacturer specifications at time of departure. Advised customer of system age and recommended monitoring for future component wear given visible corrosion on refrigerant lines
Anthony L.
Anthony L. Checked in
# Service Report Responded to no-cool call on 15-year-old residential HVAC system with reported minimal airflow and outdoor unit failure to operate. Upon arrival, performed comprehensive system diagnostic including electrical testing, refrigerant pressure analysis, and airflow assessment. Identified failed compressor contactor preventing outdoor condenser unit from engaging. Replaced defective contactor and verified proper electrical connections throughout system. Inspected condenser coils showing moderate debris accumulation and weathering consistent with system age; cleaned coils to restore optimal heat transfer efficiency. Tested system operation through complete cooling cycle, confirming outdoor unit engagement, proper compressor function, and restored airflow at supply registers. System operating within manufacturer specifications at time of departure. Advised customer of system age and recommended monitoring for future component wear given visible corrosion on refrigerant lines
Bardstown, KY 40004
Performed platinum level maintenance service on outdoor HVAC system, completing second visit of the annual plan. Conducted comprehensive electrical system inspection using Fieldpiece multimeter to test capacitor and circuit board components, and replaced standard CFI filter as scheduled per 2-year maintenance agreement.
Performed platinum level maintenance service on outdoor HVAC system, completing second visit of the annual plan. Conducted comprehensive electrical system inspection using Fieldpiece multimeter to test capacitor and circuit board components, and replaced standard CFI filter as scheduled per 2-year maintenance agreement.
Anthony L.
Anthony L. Checked in
Performed platinum level maintenance service on outdoor HVAC system, completing second visit of the annual plan. Conducted comprehensive electrical system inspection using Fieldpiece multimeter to test capacitor and circuit board components, and replaced standard CFI filter as scheduled per 2-year maintenance agreement.
Bardstown, KY 40004
Completed Platinum Level maintenance service on a 5-month-old system. Inspected and replaced air filter with proper size, and verified thermostat operation was functioning correctly in cooling mode at 72°F with 67% humidity. System is operating within normal parameters.
Completed Platinum Level maintenance service on a 5-month-old system. Inspected and replaced air filter with proper size, and verified thermostat operation was functioning correctly in cooling mode at 72°F with 67% humidity. System is operating within normal parameters.
Victor W.
Victor W. Checked in
Completed Platinum Level maintenance service on a 5-month-old system. Inspected and replaced air filter with proper size, and verified thermostat operation was functioning correctly in cooling mode at 72°F with 67% humidity. System is operating within normal parameters.
Bardstown, KY 40004
Completed Platinum Level maintenance on 6-year-old system with 20x20x5 filter. Performed electrical diagnostics using clamp meter, recording 58.8 amps on primary circuit. Secondary temperature readings measured at 41.1°F, confirming system is operating within manufacturer specifications.
Completed Platinum Level maintenance on 6-year-old system with 20x20x5 filter. Performed electrical diagnostics using clamp meter, recording 58.8 amps on primary circuit. Secondary temperature readings measured at 41.1°F, confirming system is operating within manufacturer specifications.
Victor W.
Victor W. Checked in
Completed Platinum Level maintenance on 6-year-old system with 20x20x5 filter. Performed electrical diagnostics using clamp meter, recording 58.8 amps on primary circuit. Secondary temperature readings measured at 41.1°F, confirming system is operating within manufacturer specifications.
Bardstown, KY 40004
Completed scheduled Platinum Level maintenance service on one HVAC system. Replaced KOCH air filter with new pleated media filter and inspected the control board/power supply module, noting proper connection of all wiring harnesses and verifying integrity of electronic components including transformers and circuit board. System is now operating at optimal efficiency per manufacturer specifications.
Completed scheduled Platinum Level maintenance service on one HVAC system. Replaced KOCH air filter with new pleated media filter and inspected the control board/power supply module, noting proper connection of all wiring harnesses and verifying integrity of electronic components including transformers and circuit board. System is now operating at optimal efficiency per manufacturer specifications.
Jordyn R.
Jordyn R. Checked in
Completed scheduled Platinum Level maintenance service on one HVAC system. Replaced KOCH air filter with new pleated media filter and inspected the control board/power supply module, noting proper connection of all wiring harnesses and verifying integrity of electronic components including transformers and circuit board. System is now operating at optimal efficiency per manufacturer specifications.
Bardstown, KY 40004
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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.