HVAC Repair, Replacement & Maintenance in Sellersburg, IN
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 Repair, Replacement & Maintenance in Sellersburg, IN

Wide shot of intricate ductwork

Achieving peak comfort in your Sellersburg or Louisville-area home means having a technician you can trust to keep your HVAC system running smoothly all year.

A+ Derr Heating & Cooling is proud to be the go-to comfort specialist for local families. With 24/7 emergency repair availability and 100% satisfaction guaranteed, you can count on us to deliver the prompt, professional solutions you need.

Schedule HVAC services in Sellersburg, IN, by calling or contacting us online today!

Air Conditioning Repair & Replacement

With average highs of 87 degrees F, summers in Sellersburg can be unbearable without a fully functioning air conditioning system. Our team offers comprehensive cooling solutions that families can count on to keep cool on the hottest days of the year. We offer:

Trusted Heating Solutions

Winters in Sellersburg can get brutally cold, with average lows of just 28 degrees. When you need to keep your home warm, A+ Derr has the heating technicians you can trust to get the job done right. Our team can help with:

  • Heating repair: Whether you smell a burning odor, hear a strange noise, or see a flickering pilot light, our 24/7 heating repair experts can help.
  • Heating replacement: We can install or replace all types of heating systems, including furnaces, boilers, and heat pumps.
  • Heating maintenance: Book a heating tune-up before winter hits to prolong your system’s lifespan and prevent premature breakdowns.

Indoor Air Quality System Installation

According to the Environmental Protection Agency, poor indoor air quality is one of the top health concerns for families in the U.S. Mold spores, dust mites, pet dander, pollen, and other airborne contaminants can hide out in your air supply, leading to respiratory illness, allergies, asthma, reduced HVAC efficiency, and many other problems.

At A+ Derr, our team offers effective indoor air quality solutions designed to eliminate harmful contaminants from your air supply. From duct cleaning services and whole-home air purification to humidifiers and dehumidifiers, we have the products and services you need to breathe easier at home.

Why Choose A+ Derr Heating & Cooling?

For nearly 50 years, our company has delivered the top-quality HVAC service experience that Kentuckiana families trust to keep their systems working smoothly. Our fourth-generation, family-operated company is deeply committed to your complete satisfaction.

If you’re not happy with a product we’ve installed after the first year, we’ll buy it back. And with 24/7 emergency service availability, you can rest assured that your HVAC repair requests will be handled with care.

Request an appointment in Sellersburg, IN, by contacting A+ Derr today. Get a free system replacement quote!

Frequently Asked Questions

If your boiler is leaking, turn off the water supply and power to the boiler, and contact a professional plumber immediately to assess and repair the issue.

Installing a new air conditioning system typically takes about one or two days, depending on the complexity of the installation and any additional modifications needed.

Yes, a dehumidifier can be added to an established HVAC system; consult an HVAC professional to ensure proper integration and functionality.

Recent Jobs and Reviews in Sellersburg, IN

Job Locations and Reviews

Completed full HVAC system installation in basement utility space. Installed new equipment with proper drainage integration utilizing existing PVC plumbing infrastructure and verified system ignition and startup. All electrical connections secured to ceiling joists per code requirements, and unit is operating within manufacturer specifications.
Completed full HVAC system installation in basement utility space. Installed new equipment with proper drainage integration utilizing existing PVC plumbing infrastructure and verified system ignition and startup. All electrical connections secured to ceiling joists per code requirements, and unit is operating within manufacturer specifications.
Tanner E.
Tanner E. Checked in
Completed full HVAC system installation in basement utility space. Installed new equipment with proper drainage integration utilizing existing PVC plumbing infrastructure and verified system ignition and startup. All electrical connections secured to ceiling joists per code requirements, and unit is operating within manufacturer specifications.
Sellersburg, IN 47172
Installed AO Smith ProLine Commercial Grade 50-gallon gas water heater in basement utility room. Connected unit with copper piping, brass fittings, pressure relief valves, and shut-off valves with proper safety components including temperature and pressure relief valve piping.
Installed AO Smith ProLine Commercial Grade 50-gallon gas water heater in basement utility room. Connected unit with copper piping, brass fittings, pressure relief valves, and shut-off valves with proper safety components including temperature and pressure relief valve piping.
Paul G.
Paul G. Checked in
Installed AO Smith ProLine Commercial Grade 50-gallon gas water heater in basement utility room. Connected unit with copper piping, brass fittings, pressure relief valves, and shut-off valves with proper safety components including temperature and pressure relief valve piping.
Sellersburg, IN 47172
Completed planned maintenance on 10-month-old HVAC system during second service visit. Performed electrical diagnostics on outdoor condensing unit using clamp meter, measuring amperage draw at 0.16 amps to verify proper compressor and fan motor operation. Inspected internal electrical components, capacitors, control boards, and wiring connections for proper function and signs of wear. All electrical parameters within manufacturer specifications. Additionally inspected water heater during visit, noting unit manufactured in January 2000 with visible condensation on exterior surface. System operating as designed with no immediate concerns identified.
Completed planned maintenance on 10-month-old HVAC system during second service visit. Performed electrical diagnostics on outdoor condensing unit using clamp meter, measuring amperage draw at 0.16 amps to verify proper compressor and fan motor operation. Inspected internal electrical components, capacitors, control boards, and wiring connections for proper function and signs of wear. All electrical parameters within manufacturer specifications. Additionally inspected water heater during visit, noting unit manufactured in January 2000 with visible condensation on exterior surface. System operating as designed with no immediate concerns identified.
Anthony L.
Anthony L. Checked in
Completed planned maintenance on 10-month-old HVAC system during second service visit. Performed electrical diagnostics on outdoor condensing unit using clamp meter, measuring amperage draw at 0.16 amps to verify proper compressor and fan motor operation. Inspected internal electrical components, capacitors, control boards, and wiring connections for proper function and signs of wear. All electrical parameters within manufacturer specifications. Additionally inspected water heater during visit, noting unit manufactured in January 2000 with visible condensation on exterior surface. System operating as designed with no immediate concerns identified.
Sellersburg, IN 47172
Completed scheduled preventive maintenance on a 5-year-old residential air conditioning system. Performed comprehensive system inspection of outdoor condenser unit, including visual assessment of cabinet condition, refrigerant line connections, and condensate drainage. Utilized Fieldpiece AC current clamp meter to measure amperage draw on compressor circuit, recording 0.50 amps during testing. Verified proper electrical connections and component operation. Condenser unit found in good operating condition with no deficiencies noted. System operating within normal parameters upon completion of tune-up service.
Completed scheduled preventive maintenance on a 5-year-old residential air conditioning system. Performed comprehensive system inspection of outdoor condenser unit, including visual assessment of cabinet condition, refrigerant line connections, and condensate drainage. Utilized Fieldpiece AC current clamp meter to measure amperage draw on compressor circuit, recording 0.50 amps during testing. Verified proper electrical connections and component operation. Condenser unit found in good operating condition with no deficiencies noted. System operating within normal parameters upon completion of tune-up service.
Anthony L.
Anthony L. Checked in
Completed scheduled preventive maintenance on a 5-year-old residential air conditioning system. Performed comprehensive system inspection of outdoor condenser unit, including visual assessment of cabinet condition, refrigerant line connections, and condensate drainage. Utilized Fieldpiece AC current clamp meter to measure amperage draw on compressor circuit, recording 0.50 amps during testing. Verified proper electrical connections and component operation. Condenser unit found in good operating condition with no deficiencies noted. System operating within normal parameters upon completion of tune-up service.
Sellersburg, IN 47172
Conducted comprehensive replacement estimate for non-functional HVAC system in basement utility area. Evaluated existing dark gray furnace unit with connected galvanized and flexible ductwork, assessed plenum transitions, and documented current system configuration including proximity to water heater and existing infrastructure. Provided homeowner with complete replacement options during consultation, captured detailed photographic documentation of equipment layout, ductwork routing, and mechanical room conditions to develop accurate system replacement proposal.
Conducted comprehensive replacement estimate for non-functional HVAC system in basement utility area. Evaluated existing dark gray furnace unit with connected galvanized and flexible ductwork, assessed plenum transitions, and documented current system configuration including proximity to water heater and existing infrastructure. Provided homeowner with complete replacement options during consultation, captured detailed photographic documentation of equipment layout, ductwork routing, and mechanical room conditions to develop accurate system replacement proposal.
Brad C.
Brad C. Checked in
Conducted comprehensive replacement estimate for non-functional HVAC system in basement utility area. Evaluated existing dark gray furnace unit with connected galvanized and flexible ductwork, assessed plenum transitions, and documented current system configuration including proximity to water heater and existing infrastructure. Provided homeowner with complete replacement options during consultation, captured detailed photographic documentation of equipment layout, ductwork routing, and mechanical room conditions to develop accurate system replacement proposal.
Sellersburg, IN 47172
Sellersburg, IN - Responded to no cooling complaint on 1-year-old system displaying error code 270 and short cycling. Diagnosed fault code indicating pressure switch issue and inspected burner assembly and gas valve components for proper operation. Identified and documented ductwork deficiencies with visible penetrations requiring sealing to restore system efficiency and resolve short cycling condition.
Brandon H.
Brandon H. Checked in
Responded to no cooling complaint on 1-year-old system displaying error code 270 and short cycling. Diagnosed fault code indicating pressure switch issue and inspected burner assembly and gas valve components for proper operation. Identified and documented ductwork deficiencies with visible penetrations requiring sealing to restore system efficiency and resolve short cycling condition.
Sellersburg, IN 47172
Sellersburg, IN - Diagnosed intermittent hot water supply issue with boiler system requiring frequent resets. Inspection of control interface revealed temperature differential issues between inlet (139°F) and outlet (152°F) water temperatures. Adjusted flame current settings and fan speed parameters to stabilize heating cycle, resolving the reset requirement problem.
Vince B.
Vince B. Checked in
Diagnosed intermittent hot water supply issue with boiler system requiring frequent resets. Inspection of control interface revealed temperature differential issues between inlet (139°F) and outlet (152°F) water temperatures. Adjusted flame current settings and fan speed parameters to stabilize heating cycle, resolving the reset requirement problem.
Sellersburg, IN 47172
Performed monthly platinum maintenance service on customer's HVAC system. Replaced 16x25x1 air filters (12 total provided due to previous missed service). Inspected furnace operation, confirmed proper burner ignition and flame characteristics, and verified gas valve functionality during operational test.
Performed monthly platinum maintenance service on customer's HVAC system. Replaced 16x25x1 air filters (12 total provided due to previous missed service). Inspected furnace operation, confirmed proper burner ignition and flame characteristics, and verified gas valve functionality during operational test.
Anthony L.
Anthony L. Checked in
Performed monthly platinum maintenance service on customer's HVAC system. Replaced 16x25x1 air filters (12 total provided due to previous missed service). Inspected furnace operation, confirmed proper burner ignition and flame characteristics, and verified gas valve functionality during operational test.
Sellersburg, IN 47172
Completed Platinum Level maintenance on a single HVAC system, which included inspecting internal components and electrical connections. Performed diagnostic testing using specialized tools on the condenser unit, checking refrigerant lines and service valves. Cleaned accumulated debris from system housing and verified proper fan operation as part of the scheduled maintenance protocol.
Completed Platinum Level maintenance on a single HVAC system, which included inspecting internal components and electrical connections. Performed diagnostic testing using specialized tools on the condenser unit, checking refrigerant lines and service valves. Cleaned accumulated debris from system housing and verified proper fan operation as part of the scheduled maintenance protocol.
Victor W.
Victor W. Checked in
Completed Platinum Level maintenance on a single HVAC system, which included inspecting internal components and electrical connections. Performed diagnostic testing using specialized tools on the condenser unit, checking refrigerant lines and service valves. Cleaned accumulated debris from system housing and verified proper fan operation as part of the scheduled maintenance protocol.
Sellersburg, IN 47172
Responded to no-heat service call for 5-10 year old system where customer reported unit running but insufficient heating (59°F indoor temperature with thermostat set to 72°F). Diagnostic inspection revealed system was operating with functional burner assembly showing proper flame pattern, but identified issue with control board (YMRG 150-2080) that was preventing proper heating cycle completion. Repaired electronic control module connections and restored normal heating function.
Responded to no-heat service call for 5-10 year old system where customer reported unit running but insufficient heating (59°F indoor temperature with thermostat set to 72°F). Diagnostic inspection revealed system was operating with functional burner assembly showing proper flame pattern, but identified issue with control board (YMRG 150-2080) that was preventing proper heating cycle completion. Repaired electronic control module connections and restored normal heating function.
Jordyn R.
Jordyn R. Checked in
Responded to no-heat service call for 5-10 year old system where customer reported unit running but insufficient heating (59°F indoor temperature with thermostat set to 72°F). Diagnostic inspection revealed system was operating with functional burner assembly showing proper flame pattern, but identified issue with control board (YMRG 150-2080) that was preventing proper heating cycle completion. Repaired electronic control module connections and restored normal heating function.
Sellersburg, IN 47172
Performed scheduled maintenance on 10-year-old single HVAC system with CFI filter. Inspected igniter component showing signs of wear and discoloration at the ceramic section. Examined blower wheel assembly which appeared to be in functional condition. Service visit was dismissed as this was a first-time inspection with no renewal requested.
Performed scheduled maintenance on 10-year-old single HVAC system with CFI filter. Inspected igniter component showing signs of wear and discoloration at the ceramic section. Examined blower wheel assembly which appeared to be in functional condition. Service visit was dismissed as this was a first-time inspection with no renewal requested.
Jordyn R.
Jordyn R. Checked in
Performed scheduled maintenance on 10-year-old single HVAC system with CFI filter. Inspected igniter component showing signs of wear and discoloration at the ceramic section. Examined blower wheel assembly which appeared to be in functional condition. Service visit was dismissed as this was a first-time inspection with no renewal requested.
Sellersburg, IN 47172

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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.