Local HVAC Services In Boonville, IN | AC & Heating Repair
24/7 Emergency Service

HVAC emergencies happen when you least expect them. Contact the professionals at A+ Derr to take care of your issue. We have the necessary skills and tools to fix your system so you can safely use it once again. Call our team at 833-232-4328 to get emergency HVAC services in Louisville, KY, Evansville, IN, or the surrounding areas.

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Heating, Cooling & Indoor Air Quality in Boonville, IN

A good HVAC system in your home can make hot and cold days much more bearable. If your heater or air conditioner isn’t keeping up with the outdoor temperatures, look to A+ Derr Heating & Cooling for help. Our expert technicians can uncover the root cause of your system’s issues and provide the most necessary solutions.Contact the A+ Derr team online or call 833-232-4328 to schedule HVAC services at your Boonville home.

Heating Services

Staying warm during the cold winter months requires a top-notch heating unit. When it’s time for repair, replacement, or maintenance, turn to the pros at A+ Derr. We can provide services for every type of heating unit, including:

  • Furnaces: We guarantee that your furnace has a good heating element, blower motor, and air filter. We provide furnace installation, maintenance, and repairs.
  • Heat Pumps: We’ll make sure your heat pump is still moving heat energy into your home from outside.
  • Ductless mini-splits: We’ll ensure that your wall-mounted mini-split can still control the climate in your room.

Air Conditioning in Boonville, IN

Even in Indiana, the summer temperatures can reach well into the 80s and 90s. Is your AC ready to keep you cool all summer long? If not, turn to the A+ Derr team for assistance. We offer:

  • Installation and replacement: Our team can replace your old, dying AC with a brand-new, energy-efficient model.
  • Repair: Our staff can diagnose and resolve any problem going on with your AC unit.
  • Maintenance: Our crew can perform a comprehensive, multipoint inspection of the internal workings of your AC system.

Whether you have an air conditioner, heat pump, or series of ductless mini-splits, look to A+ Derr for the services you need most. Call 833-232-4328 now or contact us online to get started.

Benefits of Upgrading Your HVAC System

Replacing any part of your HVAC system can make a world of difference in your home’s climate. Just a few perks of replacing your system include:

  • Consistent heating and cooling for every room: Enjoy comfortable temperatures wherever you go in your house.
  • Lower energy bills and a reduced carbon footprint: Save money and help save the planet simultaneously.
  • Less chance of needing regular repairs and maintenance: New HVAC systems are much less likely to need repairs for a while after installation.

Reach out to A+ Derr online or call 833-232-4328 now to schedule HVAC system replacement services in Boonville.

Indoor Air Quality Services

Breathing the cleanest air possible is vital to your health. With the right indoor air quality services, you can rest easy knowing your air is pure. You may have low-quality air throughout your home if:

  • You have experienced more allergies in recent months
  • You notice layers of dust on your tables and surfaces
  • Your HVAC filters seem dustier than ever before

Enjoy clean air every day with help from A+ Derr. Contact us online or call our team at 833-232-4328 to schedule IAQ services.

Why Choose A+ Derr?

Since 1975, A+ Derr has been resolving HVAC problems for clients throughout the Boonville region. Our fourth-generation family business treats every client like one of our own. You can count on us for free estimates, 24/7 emergency service, Lennox-brand HVAC units, and a 100% satisfaction guarantee.Schedule HVAC services in Boonville, IN, now by calling 833-232-4328 or contacting us online.

Recent Jobs and Reviews in Boonville, IN

Job Locations and Reviews

Performed scheduled 3-month maintenance service on NSSU unit. Inspected Lennox control board and verified proper connections of thermostat wiring terminals (W1, W2, Y1, Y2). All electronic components including circuit board, heat sink, and wire connections were found in normal working condition with no signs of damage or corrosion.
Performed scheduled 3-month maintenance service on NSSU unit. Inspected Lennox control board and verified proper connections of thermostat wiring terminals (W1, W2, Y1, Y2). All electronic components including circuit board, heat sink, and wire connections were found in normal working condition with no signs of damage or corrosion.
Jacob D.
Jacob D. Checked in
Performed scheduled 3-month maintenance service on NSSU unit. Inspected Lennox control board and verified proper connections of thermostat wiring terminals (W1, W2, Y1, Y2). All electronic components including circuit board, heat sink, and wire connections were found in normal working condition with no signs of damage or corrosion.
Boonville, IN 47601
Performed comprehensive assessment of 20-year-old HVAC system requiring replacement. Evaluated electrical panel capacity and workspace conditions for potential installation options. Recommended cost-effective replacement solutions including mini-split system alternatives based on customer's efficiency requirements and existing home infrastructure.
Performed comprehensive assessment of 20-year-old HVAC system requiring replacement. Evaluated electrical panel capacity and workspace conditions for potential installation options. Recommended cost-effective replacement solutions including mini-split system alternatives based on customer's efficiency requirements and existing home infrastructure.
Nick B.
Nick B. Checked in
Performed comprehensive assessment of 20-year-old HVAC system requiring replacement. Evaluated electrical panel capacity and workspace conditions for potential installation options. Recommended cost-effective replacement solutions including mini-split system alternatives based on customer's efficiency requirements and existing home infrastructure.
Boonville, IN 47601
Performed annual Platinum Level maintenance on Daikin HVAC system (installed 11/28/25). Inspected control board circuitry and connections, verified proper operation of compressor unit, and examined refrigerant lines and evaporator coil assembly for optimal performance. System is functioning properly with all components in working condition, though minor dust accumulation was noted and cleaned.
Performed annual Platinum Level maintenance on Daikin HVAC system (installed 11/28/25). Inspected control board circuitry and connections, verified proper operation of compressor unit, and examined refrigerant lines and evaporator coil assembly for optimal performance. System is functioning properly with all components in working condition, though minor dust accumulation was noted and cleaned.
Jacob D.
Jacob D. Checked in
Performed annual Platinum Level maintenance on Daikin HVAC system (installed 11/28/25). Inspected control board circuitry and connections, verified proper operation of compressor unit, and examined refrigerant lines and evaporator coil assembly for optimal performance. System is functioning properly with all components in working condition, though minor dust accumulation was noted and cleaned.
Boonville, IN 47601
Boonville, IN - Responded to service call for disconnected ductwork. Located and reattached loose supply duct in crawlspace that was improperly discharging conditioned air. Verified proper airflow restoration to living space and confirmed system operation after repair.
Shawn M.
Shawn M. Checked in
Responded to service call for disconnected ductwork. Located and reattached loose supply duct in crawlspace that was improperly discharging conditioned air. Verified proper airflow restoration to living space and confirmed system operation after repair.
Boonville, IN 47601
Successfully installed warranted part in customer's plumbing system, replacing faulty valve/sensor component that was showing signs of corrosion. Verified proper connection of electrical components and tested system functionality after installation, confirming resolution of the issue with all connections secure and operational.
Successfully installed warranted part in customer's plumbing system, replacing faulty valve/sensor component that was showing signs of corrosion. Verified proper connection of electrical components and tested system functionality after installation, confirming resolution of the issue with all connections secure and operational.
Kyle D.
Kyle D. Checked in
Successfully installed warranted part in customer's plumbing system, replacing faulty valve/sensor component that was showing signs of corrosion. Verified proper connection of electrical components and tested system functionality after installation, confirming resolution of the issue with all connections secure and operational.
Boonville, IN 47601
Responded to no-heat call for 20-year-old furnace that was completely non-responsive despite thermostat being set to 66°F (actual indoor temp 54°F). Diagnosed faulty control board and replaced component, restoring proper system operation. Verified all connections at thermostat and conducted full system test to confirm heating function has been successfully restored.
Responded to no-heat call for 20-year-old furnace that was completely non-responsive despite thermostat being set to 66°F (actual indoor temp 54°F). Diagnosed faulty control board and replaced component, restoring proper system operation. Verified all connections at thermostat and conducted full system test to confirm heating function has been successfully restored.
Shawn M.
Shawn M. Checked in
Responded to no-heat call for 20-year-old furnace that was completely non-responsive despite thermostat being set to 66°F (actual indoor temp 54°F). Diagnosed faulty control board and replaced component, restoring proper system operation. Verified all connections at thermostat and conducted full system test to confirm heating function has been successfully restored.
Boonville, IN 47601
Installed a complete 2.5-ton Lennox HVAC system with 14 SEER condenser unit and 97% efficiency furnace. System includes properly connected PVC exhaust/intake venting and all necessary ductwork connections. Both indoor furnace unit and outdoor condenser were positioned and secured according to manufacturer specifications, with the outdoor unit mounted on a concrete pad adjacent to the residence.
Installed a complete 2.5-ton Lennox HVAC system with 14 SEER condenser unit and 97% efficiency furnace. System includes properly connected PVC exhaust/intake venting and all necessary ductwork connections. Both indoor furnace unit and outdoor condenser were positioned and secured according to manufacturer specifications, with the outdoor unit mounted on a concrete pad adjacent to the residence.
Ian H.
Ian H. Checked in
Installed a complete 2.5-ton Lennox HVAC system with 14 SEER condenser unit and 97% efficiency furnace. System includes properly connected PVC exhaust/intake venting and all necessary ductwork connections. Both indoor furnace unit and outdoor condenser were positioned and secured according to manufacturer specifications, with the outdoor unit mounted on a concrete pad adjacent to the residence.
Boonville, IN 47601
Boonville, IN - Performed planned maintenance on a 1-year-old residential HVAC system with 25x25x5 filter during second scheduled visit. Inspected furnace operation, verified proper duct sealing, and confirmed tankless water heater integration with heating system. System is functioning within normal parameters with all components properly installed in basement mechanical room.
Christian C.
Christian C. Checked in
Performed planned maintenance on a 1-year-old residential HVAC system with 25x25x5 filter during second scheduled visit. Inspected furnace operation, verified proper duct sealing, and confirmed tankless water heater integration with heating system. System is functioning within normal parameters with all components properly installed in basement mechanical room.
Boonville, IN 47601
Conducted inspection of sewer system in response to reported cross-contamination between bathroom fixtures and strong sewage odor. Located and accessed outdoor sewer cleanout, revealing significant blockage in main line with standing water. Visual inspection of pipe interior showed deterioration of concrete walls with visible corrosion and sediment buildup, indicating potential need for line cleaning and possible pipe repair.
Conducted inspection of sewer system in response to reported cross-contamination between bathroom fixtures and strong sewage odor. Located and accessed outdoor sewer cleanout, revealing significant blockage in main line with standing water. Visual inspection of pipe interior showed deterioration of concrete walls with visible corrosion and sediment buildup, indicating potential need for line cleaning and possible pipe repair.
Kyle D.
Kyle D. Checked in
Conducted inspection of sewer system in response to reported cross-contamination between bathroom fixtures and strong sewage odor. Located and accessed outdoor sewer cleanout, revealing significant blockage in main line with standing water. Visual inspection of pipe interior showed deterioration of concrete walls with visible corrosion and sediment buildup, indicating potential need for line cleaning and possible pipe repair.
Boonville, IN 47601
Performed comprehensive inspection of aging HVAC system showing significant copper line corrosion and oxidation at connection points. Documented deteriorated ductwork with improper insulation and noted measurements (20"x15" supply plenum) for replacement sizing. Recommended complete system replacement due to extensive corrosion damage and potential efficiency/safety concerns with current installation.
Performed comprehensive inspection of aging HVAC system showing significant copper line corrosion and oxidation at connection points. Documented deteriorated ductwork with improper insulation and noted measurements (20"x15" supply plenum) for replacement sizing. Recommended complete system replacement due to extensive corrosion damage and potential efficiency/safety concerns with current installation.
Francis I.
Francis I. Checked in
Performed comprehensive inspection of aging HVAC system showing significant copper line corrosion and oxidation at connection points. Documented deteriorated ductwork with improper insulation and noted measurements (20"x15" supply plenum) for replacement sizing. Recommended complete system replacement due to extensive corrosion damage and potential efficiency/safety concerns with current installation.
Boonville, IN 47601
Responded to a red-tagged 12-year-old heating system where gas company had identified safety concerns. Conducted CO testing near air vents, obtaining readings of 4 PPM, and performed comprehensive inspection of the Goodman outdoor unit. System remains deactivated pending necessary repairs to meet safety compliance requirements.
Responded to a red-tagged 12-year-old heating system where gas company had identified safety concerns. Conducted CO testing near air vents, obtaining readings of 4 PPM, and performed comprehensive inspection of the Goodman outdoor unit. System remains deactivated pending necessary repairs to meet safety compliance requirements.
Drew C.
Drew C. Checked in
Responded to a red-tagged 12-year-old heating system where gas company had identified safety concerns. Conducted CO testing near air vents, obtaining readings of 4 PPM, and performed comprehensive inspection of the Goodman outdoor unit. System remains deactivated pending necessary repairs to meet safety compliance requirements.
Boonville, IN 47601
Completed Platinum Level maintenance on 6-year-old HVAC system with 16x25x5 filter. Performed airflow measurements at ceiling registers with UEi instrument, recording 25 CFM. Conducted temperature diagnostics on ductwork with readings of 69°F, confirming proper system operation.
Completed Platinum Level maintenance on 6-year-old HVAC system with 16x25x5 filter. Performed airflow measurements at ceiling registers with UEi instrument, recording 25 CFM. Conducted temperature diagnostics on ductwork with readings of 69°F, confirming proper system operation.
Michael H.
Michael H. Checked in
Completed Platinum Level maintenance on 6-year-old HVAC system with 16x25x5 filter. Performed airflow measurements at ceiling registers with UEi instrument, recording 25 CFM. Conducted temperature diagnostics on ductwork with readings of 69°F, confirming proper system operation.
Boonville, IN 47601
Diagnosed high limit switch fault on 7-year-old HVAC system displaying 4 red flash code. System was operational but unable to heat above 68°F despite thermostat setting of 72°F. Inspected control board connections and wiring harness, verified integrity of electrical components, and reset high limit switch. System now functioning properly with full temperature range capability.
Diagnosed high limit switch fault on 7-year-old HVAC system displaying 4 red flash code. System was operational but unable to heat above 68°F despite thermostat setting of 72°F. Inspected control board connections and wiring harness, verified integrity of electrical components, and reset high limit switch. System now functioning properly with full temperature range capability.
Francis I.
Francis I. Checked in
Diagnosed high limit switch fault on 7-year-old HVAC system displaying 4 red flash code. System was operational but unable to heat above 68°F despite thermostat setting of 72°F. Inspected control board connections and wiring harness, verified integrity of electrical components, and reset high limit switch. System now functioning properly with full temperature range capability.
Boonville, IN 47601
Completed installation of a Lennox 3-ton, 18 SEER, 99% efficiency complete HVAC system. Installed polarized filter and ran gas line to water heater with tee and shutoff for future expansion. System includes S40 Smart Thermostat for temperature and air quality control.
Completed installation of a Lennox 3-ton, 18 SEER, 99% efficiency complete HVAC system. Installed polarized filter and ran gas line to water heater with tee and shutoff for future expansion. System includes S40 Smart Thermostat for temperature and air quality control.
Cole B.
Cole B. Checked in
Completed installation of a Lennox 3-ton, 18 SEER, 99% efficiency complete HVAC system. Installed polarized filter and ran gas line to water heater with tee and shutoff for future expansion. System includes S40 Smart Thermostat for temperature and air quality control.
Boonville, IN 47601
Boonville, IN - Completed monthly maintenance service on 5-year-old HVAC system per Platinum Level agreement. Replaced 16x25x2 polarized filter and inspected system components in basement installation area. Equipment functioning properly with no issues identified.
Jeff J.
Jeff J. Checked in
Completed monthly maintenance service on 5-year-old HVAC system per Platinum Level agreement. Replaced 16x25x2 polarized filter and inspected system components in basement installation area. Equipment functioning properly with no issues identified.
Boonville, IN 47601
Conducted comprehensive HVAC replacement consultation for 18-year-old system. Inspected existing Honeywell thermostat wiring configuration and outdoor AC unit, which shows typical age-related wear. Customer is evaluating competitive quotes for system replacement and seeking more cost-effective options.
Conducted comprehensive HVAC replacement consultation for 18-year-old system. Inspected existing Honeywell thermostat wiring configuration and outdoor AC unit, which shows typical age-related wear. Customer is evaluating competitive quotes for system replacement and seeking more cost-effective options.
Nick B.
Nick B. Checked in
Conducted comprehensive HVAC replacement consultation for 18-year-old system. Inspected existing Honeywell thermostat wiring configuration and outdoor AC unit, which shows typical age-related wear. Customer is evaluating competitive quotes for system replacement and seeking more cost-effective options.
Boonville, IN 47601
Completed panel replacement service (WO #15958), replacing outdated electrical panel with new circuit breaker panel featuring dual columns of properly labeled circuit breakers. Installation included proper mounting to concrete block wall with main breaker switch and comprehensive circuit directory for improved safety and functionality.
Completed panel replacement service (WO #15958), replacing outdated electrical panel with new circuit breaker panel featuring dual columns of properly labeled circuit breakers. Installation included proper mounting to concrete block wall with main breaker switch and comprehensive circuit directory for improved safety and functionality.
Steven W.
Steven W. Checked in
Completed panel replacement service (WO #15958), replacing outdated electrical panel with new circuit breaker panel featuring dual columns of properly labeled circuit breakers. Installation included proper mounting to concrete block wall with main breaker switch and comprehensive circuit directory for improved safety and functionality.
Boonville, IN 47601
Boonville, IN - Performed scheduled Platinum Level maintenance on 8-year-old Amana HVAC system located in attic space. Replaced 16x25x4 monthly filter, inspected ductwork connections and PVC condensate lines for proper function. System operating within normal parameters following service.
Luke O.
Luke O. Checked in
Performed scheduled Platinum Level maintenance on 8-year-old Amana HVAC system located in attic space. Replaced 16x25x4 monthly filter, inspected ductwork connections and PVC condensate lines for proper function. System operating within normal parameters following service.
Boonville, IN 47601
Boonville, IN - Diagnosed 20-year-old Coleman wall-mounted heating unit with ignition system failure indicator. Performed comprehensive inspection of ignition assembly components and determined unit requires replacement due to age and unavailability of parts. Recommended installation of new energy-efficient system.
Danny M.
Danny M. Checked in
Diagnosed 20-year-old Coleman wall-mounted heating unit with ignition system failure indicator. Performed comprehensive inspection of ignition assembly components and determined unit requires replacement due to age and unavailability of parts. Recommended installation of new energy-efficient system.
Boonville, IN 47601
Boonville, IN - Completed scheduled Gold Level maintenance for dual HVAC system setup. Inspected and documented 20X5X1 filter size requirement for first unit, examined ductwork and connection points, and verified system information from equipment data plate. Both systems were cleaned and serviced according to manufacturer specifications, with all maintenance tasks documented photographically for service records.
Francis I.
Francis I. Checked in
Completed scheduled Gold Level maintenance for dual HVAC system setup. Inspected and documented 20X5X1 filter size requirement for first unit, examined ductwork and connection points, and verified system information from equipment data plate. Both systems were cleaned and serviced according to manufacturer specifications, with all maintenance tasks documented photographically for service records.
Boonville, IN 47601
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Discover The A+ Derr Difference

24/7 Heating & Cooling Repairs​

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

Licensed & Experienced Technicians​

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

100% Satisfaction Guarantee​

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

Servicing All Major Makes & Models Of Equipment

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

Locally Owned & Operated​

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

50+ Years in Business​

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

24/7 Heating & Cooling Repairs​

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

Licensed & Experienced Technicians​

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

100% Satisfaction Guarantee​

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

Servicing All Major Makes & Models Of Equipment

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

Locally Owned & Operated​

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

50+ Years in Business​

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

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Our Reviews

See What Your Neighbors Are Saying

I would recommend A+ Derr and their staff any day! Best service I have ever had! Go to them for your Heating and Cooling needs. You will not be disappointed.

Barbara C.

Barbara C.

Very good service. Knowledgeable HVAC experts always keeping us cool in the summer and warm all winter. This is a great team of professionals from start to finish.

Craig B.

Craig B.

Amazing level of courtesy and professionalism. Communication was great and the price was more than reasonable. Highly recommend.

Chip M.

Chip M.

Guys came and installed two full systems at the house. Respectful, cleaned up after themselves and answered any and all questions. Thank you again!! Definitely recommend!

Jason H.

Jason H.

Very knowledgeable and courteous. Toured me through all the functions of the new unit. Completed work very neatly and respectfully. Would recommend to anyone.

Derek S.

Derek S.