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

Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Nick B.
Nick B. Checked in
Completed comprehensive HVAC estimate for air conditioning system replacement due to non-operational 10-year-old unit that would not power on. Assessed existing basement installation, documented current furnace configuration with connected ductwork and plenum system, and captured detailed measurements and spatial requirements for new AC unit installation. The existing heating furnace was confirmed operational and requires no service at this time.
Boonville, IN 47601
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Christian C.
Christian C. Checked in
Completed Gold Level annual maintenance inspection on residential HVAC system. Performed comprehensive examination of control board, electrical connections, gas valve assembly, and blower components, documenting equipment condition with photos of manufacturer data plate and internal components. All system components found operating within normal parameters during this first annual service visit.
Boonville, IN 47601
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Nick B.
Nick B. Checked in
Completed comprehensive HVAC system replacement estimate for municipal contractor requiring outdoor condensing unit replacement. Verified existing Carrier furnace system non-operational with customer declining repair option in favor of full outdoor unit replacement. Documented existing basement installation including furnace configuration, venting system, PVC condensate drainage, and current mechanical room layout through photographic documentation to facilitate accurate equipment specifications and installation planning for municipal approval process.
Boonville, IN 47601
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Isaac G.
Isaac G. Checked in
Completed comprehensive plumbing repairs including replacement of leaking tub hardware, rebuilding toilet flush mechanisms in multiple bathrooms, and installing new shut-off valves in two rooms to improve water control and accessibility. Diagnosed and resolved low water pressure issues throughout the residence, restoring proper flow to all fixtures.
Boonville, IN 47601
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Brock B.
Brock B. Checked in
Completed platinum-level preventive maintenance on a one-year-old residential HVAC system during the second annual visit. Inspected and serviced indoor air handler unit and outdoor condensing unit, replaced 20x25x5 air filter, verified proper airflow through ductwork connections, and confirmed all electrical connections and refrigerant lines were secure. System operating within manufacturer specifications with all components functioning properly.
Boonville, IN 47601
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Christian C.
Christian C. Checked in
Completed annual planned maintenance visit on Lennox HVAC system. Performed comprehensive inspection of indoor air handler unit and outdoor condensing unit, verified all electrical connections and components including capacitor and contactor are functioning properly, checked refrigerant levels, and inspected ductwork insulation. System operating within normal parameters with no issues identified at this time.
Boonville, IN 47601
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Brock B.
Brock B. Checked in
Completed comprehensive Platinum Level planned maintenance on dual Lennox air conditioning systems, both approximately 3 years old. Performed full system inspections including cleaning condenser coils, checking refrigerant levels and pressures, testing electrical connections and capacitors, verifying proper airflow, and replacing air filters (20x25x5 and 16x25x5). Both outdoor units showed good operational condition with proper installation on vibration-dampening pads and adequate clearance for airflow. Verified all safety controls, tested thermostat operation, and confirmed both systems are cooling efficiently with no issues detected. This represents the second annual visit for these systems, with maintenance contract renewal confirmed for continued service coverage.
Boonville, IN 47601
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Ricky B.
Ricky B. Checked in
Completed annual Platinum Level planned maintenance on dual HVAC system installation. Performed comprehensive inspection and servicing of both units, including Lennox furnace and air handler components. Replaced 25x25x5 and 16x25x5 filters, inspected condensate pump operation, verified proper drainage through PVC condensate lines, and checked refrigerant line insulation integrity. Examined all electrical connections, tested safety controls, and confirmed proper airflow through metallic ductwork. Verified water heater and mechanical room components for clearance and safety compliance. All systems operating within manufacturer specifications upon completion of first annual maintenance visit.
Boonville, IN 47601
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Michael H.
Michael H. Checked in
Completed second annual Platinum Level maintenance on a 5-year-old HVAC system. Replaced 16x25x4 air filter and performed comprehensive inspection of all system components. Verified proper operation of CoreSense Diagnostics module and electrical connections within the condensing unit, including capacitors and control wiring. Measured supply air temperature at 50.5°F, confirming adequate cooling performance. Inspected ductwork in attic space and checked all electrical terminals for secure connections. All components operating within normal parameters. System is due for service plan renewal.
Boonville, IN 47601
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Cole B.
Cole B. Checked in
Completed full HVAC system installation of a 2.5-ton, 14 SEER air conditioner with 97% AFUE furnace as an upsell from service call. System was properly commissioned with refrigerant pressures verified using digital manifold gauges, temperature splits confirmed within manufacturer specifications, and all operational parameters tested to ensure optimal performance.
Boonville, IN 47601
Conducted site assessment for geothermal HVAC system replacement, evaluating existing electrical infrastructure including main breaker panel and current outdoor condensing unit positioned on concrete pad with proper drainage. Documented equipment specifications, electrical service capacity, and installation requirements; provided comprehensive estimate for complete geothermal heat pump system installation with necessary electrical upgrades and ground loop configuration.
Conducted site assessment for geothermal HVAC system replacement, evaluating existing electrical infrastructure including main breaker panel and current outdoor condensing unit positioned on concrete pad with proper drainage. Documented equipment specifications, electrical service capacity, and installation requirements; provided comprehensive estimate for complete geothermal heat pump system installation with necessary electrical upgrades and ground loop configuration.
James W.
James W. Checked in
Conducted site assessment for geothermal HVAC system replacement, evaluating existing electrical infrastructure including main breaker panel and current outdoor condensing unit positioned on concrete pad with proper drainage. Documented equipment specifications, electrical service capacity, and installation requirements; provided comprehensive estimate for complete geothermal heat pump system installation with necessary electrical upgrades and ground loop configuration.
Boonville, IN 47601
Boonville, IN - Completed second preventive maintenance visit on 6-year-old HVAC system under Platinum Level service agreement. Performed comprehensive system inspection, replaced two 16x20x1 air filters, checked electrical components and amperage readings using calibration equipment, and verified proper system operation. Customer requires service agreement renewal for continued coverage.
Cole C.
Cole C. Checked in
Completed second preventive maintenance visit on 6-year-old HVAC system under Platinum Level service agreement. Performed comprehensive system inspection, replaced two 16x20x1 air filters, checked electrical components and amperage readings using calibration equipment, and verified proper system operation. Customer requires service agreement renewal for continued coverage.
Boonville, IN 47601
Completed comprehensive HVAC load calculation analysis for residential property, determining heating requirement of 60,952 BTUh with 792 CFM airflow and cooling requirement of 38,875 BTUh (32,618 sensible, 6,257 latent) with 1,450 CFM airflow. Documented site conditions with photos and provided detailed estimate for system replacement, pending customer financing approval for project to proceed.
Completed comprehensive HVAC load calculation analysis for residential property, determining heating requirement of 60,952 BTUh with 792 CFM airflow and cooling requirement of 38,875 BTUh (32,618 sensible, 6,257 latent) with 1,450 CFM airflow. Documented site conditions with photos and provided detailed estimate for system replacement, pending customer financing approval for project to proceed.
Danny M.
Danny M. Checked in
Completed comprehensive HVAC load calculation analysis for residential property, determining heating requirement of 60,952 BTUh with 792 CFM airflow and cooling requirement of 38,875 BTUh (32,618 sensible, 6,257 latent) with 1,450 CFM airflow. Documented site conditions with photos and provided detailed estimate for system replacement, pending customer financing approval for project to proceed.
Boonville, IN 47601
Completed annual Platinum Level maintenance on 4-year-old HVAC system during second scheduled visit. Performed comprehensive system inspection including temperature diagnostics using infrared thermometer on air handling components and ductwork, verified proper airflow through supply and return plenums, and documented temperature differentials across system components. Inspected PVC condensate drain lines in overhead installation, confirmed proper drainage and secure mounting. System operating within normal parameters with all measurements recorded for service history.
Completed annual Platinum Level maintenance on 4-year-old HVAC system during second scheduled visit. Performed comprehensive system inspection including temperature diagnostics using infrared thermometer on air handling components and ductwork, verified proper airflow through supply and return plenums, and documented temperature differentials across system components. Inspected PVC condensate drain lines in overhead installation, confirmed proper drainage and secure mounting. System operating within normal parameters with all measurements recorded for service history.
Michael H.
Michael H. Checked in
Completed annual Platinum Level maintenance on 4-year-old HVAC system during second scheduled visit. Performed comprehensive system inspection including temperature diagnostics using infrared thermometer on air handling components and ductwork, verified proper airflow through supply and return plenums, and documented temperature differentials across system components. Inspected PVC condensate drain lines in overhead installation, confirmed proper drainage and secure mounting. System operating within normal parameters with all measurements recorded for service history.
Boonville, IN 47601
Completed annual platinum-level preventive maintenance on single HVAC system recently installed in January 2026. Performed comprehensive inspection of thermostat control system, verified proper operation and documented system information including model number 108296-01 and current software revision 440.04i3. Inspected condensate drain lines and mechanical components in utility area, confirmed proper installation and secure mounting of all PVC piping, ductwork, and electrical connections. Collected filter measurements for future service requirements. System operating within normal parameters with no issues identified during first scheduled maintenance visit.
Completed annual platinum-level preventive maintenance on single HVAC system recently installed in January 2026. Performed comprehensive inspection of thermostat control system, verified proper operation and documented system information including model number 108296-01 and current software revision 440.04i3. Inspected condensate drain lines and mechanical components in utility area, confirmed proper installation and secure mounting of all PVC piping, ductwork, and electrical connections. Collected filter measurements for future service requirements. System operating within normal parameters with no issues identified during first scheduled maintenance visit.
Brent D.
Brent D. Checked in
Completed annual platinum-level preventive maintenance on single HVAC system recently installed in January 2026. Performed comprehensive inspection of thermostat control system, verified proper operation and documented system information including model number 108296-01 and current software revision 440.04i3. Inspected condensate drain lines and mechanical components in utility area, confirmed proper installation and secure mounting of all PVC piping, ductwork, and electrical connections. Collected filter measurements for future service requirements. System operating within normal parameters with no issues identified during first scheduled maintenance visit.
Boonville, IN 47601
Completed electrical installation for new pool equipment system. Installed conduit and wiring from green electrical control box mounted on exterior brick wall to pool filtration equipment, including connections for sand filter tank with black valve assembly and manifold piping system with multiple ball valves. All electrical connections made to code specifications to support pool pump and filtration system operation.
Completed electrical installation for new pool equipment system. Installed conduit and wiring from green electrical control box mounted on exterior brick wall to pool filtration equipment, including connections for sand filter tank with black valve assembly and manifold piping system with multiple ball valves. All electrical connections made to code specifications to support pool pump and filtration system operation.
Steven W.
Steven W. Checked in
Completed electrical installation for new pool equipment system. Installed conduit and wiring from green electrical control box mounted on exterior brick wall to pool filtration equipment, including connections for sand filter tank with black valve assembly and manifold piping system with multiple ball valves. All electrical connections made to code specifications to support pool pump and filtration system operation.
Boonville, IN 47601
Completed second annual Gold Level maintenance visit on 4-year-old HVAC system. Performed comprehensive diagnostic testing including temperature differential measurements and electrical readings, which showed 5.92 on multimeter during capacitor and voltage checks. Inspected condenser coil and heat exchanger components, verified system operation, and documented equipment condition with photos. System operating within normal parameters and ready for continued service.
Completed second annual Gold Level maintenance visit on 4-year-old HVAC system. Performed comprehensive diagnostic testing including temperature differential measurements and electrical readings, which showed 5.92 on multimeter during capacitor and voltage checks. Inspected condenser coil and heat exchanger components, verified system operation, and documented equipment condition with photos. System operating within normal parameters and ready for continued service.
Michael H.
Michael H. Checked in
Completed second annual Gold Level maintenance visit on 4-year-old HVAC system. Performed comprehensive diagnostic testing including temperature differential measurements and electrical readings, which showed 5.92 on multimeter during capacitor and voltage checks. Inspected condenser coil and heat exchanger components, verified system operation, and documented equipment condition with photos. System operating within normal parameters and ready for continued service.
Boonville, IN 47601
Boonville, IN - Completed annual planned maintenance on residential package HVAC unit located on exterior pad. Performed comprehensive system inspection including refrigerant lines, electrical connections, and condensate drainage. All components found operating within normal parameters with no deficiencies noted during this first visit of the annual service agreement.
Christian C.
Christian C. Checked in
Completed annual planned maintenance on residential package HVAC unit located on exterior pad. Performed comprehensive system inspection including refrigerant lines, electrical connections, and condensate drainage. All components found operating within normal parameters with no deficiencies noted during this first visit of the annual service agreement.
Boonville, IN 47601
Completed first visit of quarterly planned maintenance on HVAC system with 17x21x5 filter specifications. Accessed furnace unit, verified proper installation positioning using level measurement tool, and documented equipment condition with manufacturer labels and service documentation clearly visible in compartment. Unit operating within normal parameters with all safety labels intact and accessible.
Completed first visit of quarterly planned maintenance on HVAC system with 17x21x5 filter specifications. Accessed furnace unit, verified proper installation positioning using level measurement tool, and documented equipment condition with manufacturer labels and service documentation clearly visible in compartment. Unit operating within normal parameters with all safety labels intact and accessible.
Brent D.
Brent D. Checked in
Completed first visit of quarterly planned maintenance on HVAC system with 17x21x5 filter specifications. Accessed furnace unit, verified proper installation positioning using level measurement tool, and documented equipment condition with manufacturer labels and service documentation clearly visible in compartment. Unit operating within normal parameters with all safety labels intact and accessible.
Boonville, IN 47601
Completed first scheduled maintenance visit under three-month preventive maintenance agreement. Performed comprehensive system inspection including control board evaluation, verified all electrical connections and wire harnesses were secure, and confirmed system levelness using precision measuring tools. All components found operating within normal parameters with no deficiencies noted.
Completed first scheduled maintenance visit under three-month preventive maintenance agreement. Performed comprehensive system inspection including control board evaluation, verified all electrical connections and wire harnesses were secure, and confirmed system levelness using precision measuring tools. All components found operating within normal parameters with no deficiencies noted.
Brent D.
Brent D. Checked in
Completed first scheduled maintenance visit under three-month preventive maintenance agreement. Performed comprehensive system inspection including control board evaluation, verified all electrical connections and wire harnesses were secure, and confirmed system levelness using precision measuring tools. All components found operating within normal parameters with no deficiencies noted.
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.