HVAC & Generators In Shelbyville, 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 Shelbyville, KY

AC condenser unit with fall leaves on and around it

Nestled in the heart of Shelbyville, Kentucky, where weather patterns can shift dramatically, securing reliable HVAC and generator services is paramount for year-round comfort. With bitter winters and scorching summers, having a trustworthy heating and cooling system is essential for maintaining a cozy home environment. A+ Derr Heating & Cooling, a reputable family-operated business, committed to offering top-notch HVAC services tailored to the unique climate challenges of the region.

Established in 1975, A+ Derr Heating & Cooling has been a pillar in the HVAC industry, serving both Evansville, Indiana, and Louisville, Kentucky, in the area collectively known as “Kentuckiana.” As a fourth-generation family-operated company, we pride ourselves on our longstanding commitment to quality service and customer satisfaction.

Your Local Shelbyville Heating Experts

When winter’s chill sets in, your local Shelbyville heating experts are dedicated to providing comprehensive services for your heating needs. Specializing in the installation and repair of various heating systems, including furnaces, boilersheat pumpsmini-splitsgeothermal setups, and packaged units, we ensure your home remains comfortable year-round. With a focus on system replacements 24/7 emergency assistance, A+ Derr Heating & Air Conditioning stands ready to address any heating issues promptly, especially during critical times like winter when no heat is a pressing concern. Our commitment to quality service and expertise makes our team a reliable choice for keeping your home warm and cozy.Don’t let a heating emergency leave you in the cold. Reach out to A+ Derr at (844) 577-9729 to schedule reliable service in Shelbyville.

Air Conditioning Services You Can Trust

In the sweltering Shelbyville summers, a malfunctioning AC system can be intolerable. A+ Derr’s 24/7 repair service guarantees rapid responses to restore your cooling comfort. From repairs and replacements to routine maintenance, our team ensures your AC runs efficiently when you need it most. Whether it’s a minor repair or a complete AC overhaul, A+ Derr is your trusted partner for all your air conditioning needs.Keep cool all summer long with A+ Derr Heating & Cooling. Call us today at (844) 577-9729 and schedule trustworthy AC services.

Indoor Air Quality Specialists

Indoor air quality is vital for a healthy living environment, influencing our well-being and comfort. At A+ Derr, we recognize the importance of clean air and provide a range of services to guarantee optimal indoor air quality. Let us assist you in creating a healthier and more comfortable home:

  • Air Purifiers: Eliminate odorous and harmful gases for fresher, healthier air year-round.
  • Duct Cleaning: Remove dust and allergens to enhance indoor air quality.
  • Humidifiers: Maintain optimal humidity levels for healthier living.
  • Dehumidifiers: Prevent mold and mildew growth by controlling humidity levels effectively.

Enhance your home’s air quality with A+ Derr’s expert services. Contact us today at (844) 577-9729 to get a free quote and learn more about improving your indoor air quality.

Home Generator Services

Ensure your home remains powered during outages with A+ Derr’s reliable generator installations. By offering top-of-the-line Generac generators, we provide you with peace of mind, knowing you have a dependable backup power source in emergencies. Our team of experts will assess your home’s needs and install a generator that suits your requirements, ensuring uninterrupted power supply during blackouts.

Why Choose A+ Derr?

Choosing A+ Derr Heating & Cooling means choosing a team committed to delivering exceptional service and tailored to meet your specific HVAC needs in Shelbyville, KY. With a dedication to quality workmanship, reliability, and customer satisfaction, A+ Derr is the trusted choice for all your heating, cooling, and generator needs.

With 24/7 service, 100% satisfaction guarantee, and free estimates on replacement quotes and service calls, A+ Derr stands out as a premier HVAC provider. As a Lennox Premier Dealer, we ensure top-quality installations and replacements, emphasizing our commitment to excellence.

Explore the world of superior HVAC services with A+ Derr Heating & Cooling, your reliable partner in heating, cooling, and generator solutions in Shelbyville and beyond. Our motto is simple: Service today or you don’t pay. This commitment underscores our dedication to providing prompt and effective solutions for all your HVAC needs.

Discover the A+ Derr difference for yourself. Contact our team at (844) 577-9729 for unparalleled HVAC and generator services.  Schedule a free consultation today!

Recent Jobs and Reviews in Shelbyville, KY

Job Locations and Reviews

Shelbyville, KY - Responded to service call for flickering lights in bedroom and GFCI outlet requiring frequent resetting in master bathroom. Inspected electrical circuits, tested GFCI outlet functionality, and evaluated bedroom lighting circuit for loose connections or potential load issues. Documented existing conditions and provided recommendations for resolving intermittent power interruptions.
Collin D.
Collin D. Checked in
Responded to service call for flickering lights in bedroom and GFCI outlet requiring frequent resetting in master bathroom. Inspected electrical circuits, tested GFCI outlet functionality, and evaluated bedroom lighting circuit for loose connections or potential load issues. Documented existing conditions and provided recommendations for resolving intermittent power interruptions.
Shelbyville, KY 40065
Responded to service call for A.O. Smith Cyclone MXi modulating water heater experiencing ignition failure and flame retention issues. Upon inspection, diagnosed faulty blower motor assembly preventing proper combustion air flow, which triggered lighting error codes and prevented unit from maintaining flame. Replaced defective blower motor, tested ignition sequence, verified proper flame operation, and confirmed unit returned to normal heating cycle with tank temperature rising appropriately to setpoint of 120°F.
Responded to service call for A.O. Smith Cyclone MXi modulating water heater experiencing ignition failure and flame retention issues. Upon inspection, diagnosed faulty blower motor assembly preventing proper combustion air flow, which triggered lighting error codes and prevented unit from maintaining flame. Replaced defective blower motor, tested ignition sequence, verified proper flame operation, and confirmed unit returned to normal heating cycle with tank temperature rising appropriately to setpoint of 120°F.
Paul G.
Paul G. Checked in
Responded to service call for A.O. Smith Cyclone MXi modulating water heater experiencing ignition failure and flame retention issues. Upon inspection, diagnosed faulty blower motor assembly preventing proper combustion air flow, which triggered lighting error codes and prevented unit from maintaining flame. Replaced defective blower motor, tested ignition sequence, verified proper flame operation, and confirmed unit returned to normal heating cycle with tank temperature rising appropriately to setpoint of 120°F.
Shelbyville, KY 40065
Completed installation of two white two-piece porcelain toilets as part of a promotional replacement project. Both fixtures were properly installed with chrome flush levers, flexible water supply lines connected and tested for leaks, and all mounting hardware secured to manufacturer specifications. Verified proper operation, flushing performance, and water flow on both units before completing the job.
Completed installation of two white two-piece porcelain toilets as part of a promotional replacement project. Both fixtures were properly installed with chrome flush levers, flexible water supply lines connected and tested for leaks, and all mounting hardware secured to manufacturer specifications. Verified proper operation, flushing performance, and water flow on both units before completing the job.
Paul G.
Paul G. Checked in
Completed installation of two white two-piece porcelain toilets as part of a promotional replacement project. Both fixtures were properly installed with chrome flush levers, flexible water supply lines connected and tested for leaks, and all mounting hardware secured to manufacturer specifications. Verified proper operation, flushing performance, and water flow on both units before completing the job.
Shelbyville, KY 40065
Installed dedicated 50-amp circuit for Tesla electric vehicle charger, including new double-pole breaker installation in existing residential electrical panel. Routed appropriate gauge wiring from main panel through exterior conduit to charging location, ensuring all work meets NEC requirements for EV charging installations.
Installed dedicated 50-amp circuit for Tesla electric vehicle charger, including new double-pole breaker installation in existing residential electrical panel. Routed appropriate gauge wiring from main panel through exterior conduit to charging location, ensuring all work meets NEC requirements for EV charging installations.
Collin D.
Collin D. Checked in
Installed dedicated 50-amp circuit for Tesla electric vehicle charger, including new double-pole breaker installation in existing residential electrical panel. Routed appropriate gauge wiring from main panel through exterior conduit to charging location, ensuring all work meets NEC requirements for EV charging installations.
Shelbyville, KY 40065
Inspected 13+ year old HVAC system that was blowing cold air instead of heat. Visual examination of the furnace revealed significant age-related wear on internal components, control board, and wiring. System requires full replacement due to deterioration of critical components and inefficient operation.
Inspected 13+ year old HVAC system that was blowing cold air instead of heat. Visual examination of the furnace revealed significant age-related wear on internal components, control board, and wiring. System requires full replacement due to deterioration of critical components and inefficient operation.
Anthony L.
Anthony L. Checked in
Inspected 13+ year old HVAC system that was blowing cold air instead of heat. Visual examination of the furnace revealed significant age-related wear on internal components, control board, and wiring. System requires full replacement due to deterioration of critical components and inefficient operation.
Shelbyville, KY 40065
Performed diagnostic on 13+ year old heating system that was blowing cold air. Inspection revealed issues with the aging furnace components and connected outdoor heat pump unit. Restored proper heating operation by cleaning critical components, replacing worn parts, and recalibrating the system to ensure optimal performance.
Performed diagnostic on 13+ year old heating system that was blowing cold air. Inspection revealed issues with the aging furnace components and connected outdoor heat pump unit. Restored proper heating operation by cleaning critical components, replacing worn parts, and recalibrating the system to ensure optimal performance.
Anthony L.
Anthony L. Checked in
Performed diagnostic on 13+ year old heating system that was blowing cold air. Inspection revealed issues with the aging furnace components and connected outdoor heat pump unit. Restored proper heating operation by cleaning critical components, replacing worn parts, and recalibrating the system to ensure optimal performance.
Shelbyville, KY 40065
Shelbyville, KY - Performed scheduled AC tune-up on residential system as part of complimentary maintenance service. Inspected outdoor condensing unit (approximately 2022 model) which showed normal weather exposure but remains in functional condition. System was verified operational with no current HVAC issues reported or found during service.
Anthony L.
Anthony L. Checked in
Performed scheduled AC tune-up on residential system as part of complimentary maintenance service. Inspected outdoor condensing unit (approximately 2022 model) which showed normal weather exposure but remains in functional condition. System was verified operational with no current HVAC issues reported or found during service.
Shelbyville, KY 40065
Shelbyville, KY - Successfully installed a State brand 50-gallon electric water heater in utility closet. Completed all plumbing connections with proper hot/cold water lines and verified proper operation. Unit was properly positioned on tiled floor with appropriate clearances maintained.
Jacolby B.
Jacolby B. Checked in
Successfully installed a State brand 50-gallon electric water heater in utility closet. Completed all plumbing connections with proper hot/cold water lines and verified proper operation. Unit was properly positioned on tiled floor with appropriate clearances maintained.
Shelbyville, KY 40065
Shelbyville, KY - Completed comprehensive inspection of existing 50-gallon electric water heater. Assessed unit dimensions, connection integrity, and overall condition. Documented age-related wear on copper components while confirming system remains functional; provided detailed replacement options and recommendations based on household needs and current installation configuration.
Brad C.
Brad C. Checked in
Completed comprehensive inspection of existing 50-gallon electric water heater. Assessed unit dimensions, connection integrity, and overall condition. Documented age-related wear on copper components while confirming system remains functional; provided detailed replacement options and recommendations based on household needs and current installation configuration.
Shelbyville, KY 40065
Shelbyville, KY - Conducted on-site assessment for installation of new dishwasher electrical connection in a home without previous dishwasher wiring. Inspected main electrical panel to evaluate capacity and available circuits for dedicated 20A dishwasher circuit. Documented existing panel configuration to determine optimal wiring path from panel to kitchen installation location.
Collin D.
Collin D. Checked in
Conducted on-site assessment for installation of new dishwasher electrical connection in a home without previous dishwasher wiring. Inspected main electrical panel to evaluate capacity and available circuits for dedicated 20A dishwasher circuit. Documented existing panel configuration to determine optimal wiring path from panel to kitchen installation location.
Shelbyville, KY 40065
Performed monthly platinum level maintenance service on 2-year-old system with 16x25x4 filter. Conducted electrical diagnostics with multimeter showing 126V at terminals and pressure testing showing readings of 95/179. Completed full system inspection with all parameters within acceptable ranges.
Performed monthly platinum level maintenance service on 2-year-old system with 16x25x4 filter. Conducted electrical diagnostics with multimeter showing 126V at terminals and pressure testing showing readings of 95/179. Completed full system inspection with all parameters within acceptable ranges.
Victor W.
Victor W. Checked in
Performed monthly platinum level maintenance service on 2-year-old system with 16x25x4 filter. Conducted electrical diagnostics with multimeter showing 126V at terminals and pressure testing showing readings of 95/179. Completed full system inspection with all parameters within acceptable ranges.
Shelbyville, KY 40065
Shelbyville, KY - Inspected customer's downstairs bathroom with toilet backup issue and water accumulation around laundry room sump pump. Discovered severely corroded waste pipe connection causing system backup. Replaced deteriorated metal fitting with new PVC components to restore proper drainage function and prevent future overflows.
Jacolby B.
Jacolby B. Checked in
Inspected customer's downstairs bathroom with toilet backup issue and water accumulation around laundry room sump pump. Discovered severely corroded waste pipe connection causing system backup. Replaced deteriorated metal fitting with new PVC components to restore proper drainage function and prevent future overflows.
Shelbyville, KY 40065
Shelbyville, KY - Installed new light fixture in barn, replacing existing fluorescent unit. Worked around deteriorated ceiling insulation and exposed wooden rafters to ensure proper mounting and secure electrical connections. Verified proper operation of fixture upon completion.
Collin D.
Collin D. Checked in
Installed new light fixture in barn, replacing existing fluorescent unit. Worked around deteriorated ceiling insulation and exposed wooden rafters to ensure proper mounting and secure electrical connections. Verified proper operation of fixture upon completion.
Shelbyville, KY 40065
Inspected interior wall with vapor barrier installation where plastic sheeting had been properly cut around electrical outlets. Verified that the electrical receptacle was accessible through the moisture barrier and confirmed the junction box remained properly secured. Noted the vapor barrier installation was suitable for continued electrical service in what appears to be an unfinished space.
Inspected interior wall with vapor barrier installation where plastic sheeting had been properly cut around electrical outlets. Verified that the electrical receptacle was accessible through the moisture barrier and confirmed the junction box remained properly secured. Noted the vapor barrier installation was suitable for continued electrical service in what appears to be an unfinished space.
Collin D.
Collin D. Checked in
Inspected interior wall with vapor barrier installation where plastic sheeting had been properly cut around electrical outlets. Verified that the electrical receptacle was accessible through the moisture barrier and confirmed the junction box remained properly secured. Noted the vapor barrier installation was suitable for continued electrical service in what appears to be an unfinished space.
Shelbyville, KY 40065
Successfully installed a commercial wall-mounted stainless steel handwashing sink with dual-handle faucet in corner location. Properly secured unit to wall with appropriate mounting hardware and connected water supply lines to existing plumbing system. Tested installation for proper function and water flow, ensuring no leaks at connection points.
Successfully installed a commercial wall-mounted stainless steel handwashing sink with dual-handle faucet in corner location. Properly secured unit to wall with appropriate mounting hardware and connected water supply lines to existing plumbing system. Tested installation for proper function and water flow, ensuring no leaks at connection points.
Paul G.
Paul G. Checked in
Successfully installed a commercial wall-mounted stainless steel handwashing sink with dual-handle faucet in corner location. Properly secured unit to wall with appropriate mounting hardware and connected water supply lines to existing plumbing system. Tested installation for proper function and water flow, ensuring no leaks at connection points.
Shelbyville, KY 40065
Shelbyville, KY - Conducted a comprehensive leak search and diagnostic service in the crawlspace, identifying a severely corroded copper pipe with T-junction fitting that requires replacement. Documented the deteriorated plumbing components with photos showing significant rust damage and presented repair options to the client for potential sink installation pending their decision on proceeding with repairs.
Jacolby B.
Jacolby B. Checked in
Conducted a comprehensive leak search and diagnostic service in the crawlspace, identifying a severely corroded copper pipe with T-junction fitting that requires replacement. Documented the deteriorated plumbing components with photos showing significant rust damage and presented repair options to the client for potential sink installation pending their decision on proceeding with repairs.
Shelbyville, KY 40065
Responded to urgent water leak complaint at restaurant where water was flowing from building base. Upon inspection, discovered toilet leak in bathroom with accessible features. Repaired faulty toilet seal and inspected adjacent wall for water damage, noting minor staining that will require monitoring to ensure complete resolution of the issue.
Responded to urgent water leak complaint at restaurant where water was flowing from building base. Upon inspection, discovered toilet leak in bathroom with accessible features. Repaired faulty toilet seal and inspected adjacent wall for water damage, noting minor staining that will require monitoring to ensure complete resolution of the issue.
Paul G.
Paul G. Checked in
Responded to urgent water leak complaint at restaurant where water was flowing from building base. Upon inspection, discovered toilet leak in bathroom with accessible features. Repaired faulty toilet seal and inspected adjacent wall for water damage, noting minor staining that will require monitoring to ensure complete resolution of the issue.
Shelbyville, KY 40065
Shelbyville, KY - Diagnosed and repaired a non-functional kitchen light switch. Inspected the three-toggle switch plate mounted on wall, identified faulty wiring connection, and restored proper operation of the lighting system.
Collin D.
Collin D. Checked in
Diagnosed and repaired a non-functional kitchen light switch. Inspected the three-toggle switch plate mounted on wall, identified faulty wiring connection, and restored proper operation of the lighting system.
Shelbyville, KY 40065
Shelbyville, KY - Inspected exterior drain line issue and identified deteriorating pipe section with failing coupling. Installed temporary repair using rubber coupling with metal clamps to prevent immediate leakage, but determined complete pipe replacement necessary due to advanced deterioration. Ordered replacement parts; will return to complete permanent repair once materials arrive.
Paul G.
Paul G. Checked in
Inspected exterior drain line issue and identified deteriorating pipe section with failing coupling. Installed temporary repair using rubber coupling with metal clamps to prevent immediate leakage, but determined complete pipe replacement necessary due to advanced deterioration. Ordered replacement parts; will return to complete permanent repair once materials arrive.
Shelbyville, KY 40065
Conducted follow-up inspection regarding previous drainage issue. Documented significant water damage with standing water on kitchen floor. Examined washing machine drain connection system and identified improper discharge from drain hose to PVC pipe as likely cause of continued leakage. Recommended immediate repairs to prevent further water damage to flooring and surrounding structures.
Conducted follow-up inspection regarding previous drainage issue. Documented significant water damage with standing water on kitchen floor. Examined washing machine drain connection system and identified improper discharge from drain hose to PVC pipe as likely cause of continued leakage. Recommended immediate repairs to prevent further water damage to flooring and surrounding structures.
Paul G.
Paul G. Checked in
Conducted follow-up inspection regarding previous drainage issue. Documented significant water damage with standing water on kitchen floor. Examined washing machine drain connection system and identified improper discharge from drain hose to PVC pipe as likely cause of continued leakage. Recommended immediate repairs to prevent further water damage to flooring and surrounding structures.
Shelbyville, KY 40065
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What To Expect

Discover The A+ Derr Difference

24/7 Heating & Cooling Repairs​

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

Licensed & Experienced Technicians​

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

100% Satisfaction Guarantee​

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

Servicing All Major Makes & Models Of Equipment

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

Locally Owned & Operated​

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

50+ Years in Business​

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

24/7 Heating & Cooling Repairs​

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

Licensed & Experienced Technicians​

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

100% Satisfaction Guarantee​

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

Servicing All Major Makes & Models Of Equipment

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

Locally Owned & Operated​

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

50+ Years in Business​

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

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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.