Local HVAC Services In Ownesboro, KY | 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.

Call Today 833-232-4328 Schedule Online
FREE HVAC Replacement Estimate Request Service

Expert HVAC Service in Owensboro, KY

With the rapidly changing weather, you rely on your HVAC system to keep your home comfortable. If your HVAC system malfunctions, your home will quickly become uncomfortable. That’s where the team at A+ Derr Heating & Cooling steps in. Our team has serviced Kentuckiana-area homes for over 45 years.

To get reliable HVAC service in Kentuckiana, call 833-232-4328.

Dependable Air Conditioning

The sweltering heat is enough to drive anyone inside your home for comfort. However, if your AC goes out during a heat wave, you lose your comfort and put yourself at risk for health issues. This is why A+ Derr offers a comprehensive set of AC services.

Our AC services include the following:

  • Air conditioning repair: If you’ve noticed a decline in performance or strange noises in your system, it’s time to schedule a repair appointment.
  • Air conditioning replacement and installation: Our team can assist in the replacement and installation process if your old system has given out or you’re looking to upgrade.
  • Air conditioning maintenance: To get the most out of your AC unit, you need to conduct annual maintenance. One maintenance appointment can go a long way in extending the life span of your AC unit.

On top of central AC units, our team also services ductless mini-split systems. The ductless mini-split is an excellent alternative to a central AC unit as it can work as a heating and cooling system.

Top-Rated Heating

Just like the cold snaps in Owensboro can be brutal. When the cold weather hits, you want to be able to relax in your cozy home. Our heating services include the following:

  • Heating repair: Leaking systems or higher energy usage indicate that your heating system needs a repair appointment.
  • Heating maintenance: To ensure that your heating system runs efficiently year-round, scheduling an annual maintenance appointment is the best solution.
  • Heating installation and replacement: As a Lennox Premier Dealer, you can trust our team to handle installation and replacement appointments with high quality.

Our heating services apply to a variety of systems. Specifically, our team has heat pump and furnace services to help as many Owensboro residents as possible. Don’t let the cold take over your Owensboro home. Find the time for A+ Derr to repair or replace your heating system by calling 833-232-4328. 

Indoor Air Quality Solutions

One of the most important parts of HVAC service is the indoor air quality section. Our indoor air quality services are designed to keep the air in your home clean and your health in good standing with various services, including duct cleaning, air purifiers, and humidity control.Interested in how indoor air quality solutions can improve your Owensboro home? Call 833-232-4328 to schedule an appointment with A+ Derr.

Why Choose A+ Derr?

Dating back to 1975, our team has worked hard to provide every customer with a great experience when using A+ Derr Heating & Cooling. Along with our glowing reviews, we have financing options to take the stress out of the HVAC service process.To schedule HVAC services for your Owensboro, KY, home, call 833-232-4328.

HVAC FAQs

Why is my AC running but not cooling?

It is a clear sign that a part in the AC unit has broken. One common issue is a broken or clogged condenser coil.

How long do furnaces last?

Furnaces are built to last, as you can expect to get 15 to 20 years out of your furnace before signs of aging show. Annual maintenance can extend the life span of your system.

Recent Jobs and Reviews in Owensboro, KY

Job Locations and Reviews

Responded to no cooling complaint on 5-year-old residential air conditioning system blowing room temperature air with 8-degree temperature differential between setpoint and actual room temperature. Upon arrival, confirmed adequate airflow at supply registers with no ice formation on evaporator coil or refrigerant lines. Performed comprehensive system diagnostics on outdoor condenser unit and associated components. Inspected condenser coil for debris and airflow obstruction, verified proper electrical connections at disconnect panel, and evaluated refrigerant line set connections at condensing unit. System evaluated for proper refrigerant charge, compressor operation, and capacitor function to identify root cause of loss of cooling capacity and restore proper system operation.
Responded to no cooling complaint on 5-year-old residential air conditioning system blowing room temperature air with 8-degree temperature differential between setpoint and actual room temperature. Upon arrival, confirmed adequate airflow at supply registers with no ice formation on evaporator coil or refrigerant lines. Performed comprehensive system diagnostics on outdoor condenser unit and associated components. Inspected condenser coil for debris and airflow obstruction, verified proper electrical connections at disconnect panel, and evaluated refrigerant line set connections at condensing unit. System evaluated for proper refrigerant charge, compressor operation, and capacitor function to identify root cause of loss of cooling capacity and restore proper system operation.
Cole C.
Cole C. Checked in
Responded to no cooling complaint on 5-year-old residential air conditioning system blowing room temperature air with 8-degree temperature differential between setpoint and actual room temperature. Upon arrival, confirmed adequate airflow at supply registers with no ice formation on evaporator coil or refrigerant lines. Performed comprehensive system diagnostics on outdoor condenser unit and associated components. Inspected condenser coil for debris and airflow obstruction, verified proper electrical connections at disconnect panel, and evaluated refrigerant line set connections at condensing unit. System evaluated for proper refrigerant charge, compressor operation, and capacitor function to identify root cause of loss of cooling capacity and restore proper system operation.
Owensboro, KY 42301
Performed comprehensive HVAC replacement estimate for residential property. Evaluated existing furnace and air handler system located in interior closet space, documenting current equipment configuration including ductwork connections, condensate drain lines, and spatial constraints. Assessed installation accessibility, measured available clearances for replacement equipment, and photographed existing system components to determine optimal replacement unit specifications and installation requirements.
Performed comprehensive HVAC replacement estimate for residential property. Evaluated existing furnace and air handler system located in interior closet space, documenting current equipment configuration including ductwork connections, condensate drain lines, and spatial constraints. Assessed installation accessibility, measured available clearances for replacement equipment, and photographed existing system components to determine optimal replacement unit specifications and installation requirements.
Jake T.
Jake T. Checked in
Performed comprehensive HVAC replacement estimate for residential property. Evaluated existing furnace and air handler system located in interior closet space, documenting current equipment configuration including ductwork connections, condensate drain lines, and spatial constraints. Assessed installation accessibility, measured available clearances for replacement equipment, and photographed existing system components to determine optimal replacement unit specifications and installation requirements.
Owensboro, KY 42303
Completed follow-up site visit to investigate and document reported water leak condition. Inspected HVAC system installation including refrigerant line insulation, condensate drainage routing, and air handler unit operation. Documented existing pipe insulation configuration with gray foam covering refrigerant lines secured with mounting straps in ceiling cavity. Verified air handler unit displaying 70° on digital readout and confirmed proper flexible duct connection to ceiling plenum. Photographed electrical wiring routing, safety switch mounting, and overall system component placement for service records. No active water leak observed at time of inspection; all insulated lines and connections appeared dry with no visible moisture damage to surrounding ceiling materials or equipment surfaces.
Completed follow-up site visit to investigate and document reported water leak condition. Inspected HVAC system installation including refrigerant line insulation, condensate drainage routing, and air handler unit operation. Documented existing pipe insulation configuration with gray foam covering refrigerant lines secured with mounting straps in ceiling cavity. Verified air handler unit displaying 70° on digital readout and confirmed proper flexible duct connection to ceiling plenum. Photographed electrical wiring routing, safety switch mounting, and overall system component placement for service records. No active water leak observed at time of inspection; all insulated lines and connections appeared dry with no visible moisture damage to surrounding ceiling materials or equipment surfaces.
Tyler C.
Tyler C. Checked in
Completed follow-up site visit to investigate and document reported water leak condition. Inspected HVAC system installation including refrigerant line insulation, condensate drainage routing, and air handler unit operation. Documented existing pipe insulation configuration with gray foam covering refrigerant lines secured with mounting straps in ceiling cavity. Verified air handler unit displaying 70° on digital readout and confirmed proper flexible duct connection to ceiling plenum. Photographed electrical wiring routing, safety switch mounting, and overall system component placement for service records. No active water leak observed at time of inspection; all insulated lines and connections appeared dry with no visible moisture damage to surrounding ceiling materials or equipment surfaces.
Owensboro, KY 42303
Responded to no-cooling complaint on 12-15 year old geothermal system where thermostat was set to 71°F but indoor temperature had risen to 75°F. Performed diagnostic inspection of air handler, refrigerant lines, and condensate pump system. Inspected insulated refrigerant line connections at air handler unit, ductwork interfaces, and verified condensate pump operation in mechanical closet. System evaluated and findings documented with photographic evidence of equipment condition.
Responded to no-cooling complaint on 12-15 year old geothermal system where thermostat was set to 71°F but indoor temperature had risen to 75°F. Performed diagnostic inspection of air handler, refrigerant lines, and condensate pump system. Inspected insulated refrigerant line connections at air handler unit, ductwork interfaces, and verified condensate pump operation in mechanical closet. System evaluated and findings documented with photographic evidence of equipment condition.
Cole C.
Cole C. Checked in
Responded to no-cooling complaint on 12-15 year old geothermal system where thermostat was set to 71°F but indoor temperature had risen to 75°F. Performed diagnostic inspection of air handler, refrigerant lines, and condensate pump system. Inspected insulated refrigerant line connections at air handler unit, ductwork interfaces, and verified condensate pump operation in mechanical closet. System evaluated and findings documented with photographic evidence of equipment condition.
Owensboro, KY 42301
Responded to no cooling complaint with system blowing warm air. Performed diagnostic evaluation of air handler and ductwork system. Verified adequate airflow through supply vents with no ice buildup present on evaporator coil or surrounding components. Inspected thermostat operation and temperature settings for proper functionality.
Responded to no cooling complaint with system blowing warm air. Performed diagnostic evaluation of air handler and ductwork system. Verified adequate airflow through supply vents with no ice buildup present on evaporator coil or surrounding components. Inspected thermostat operation and temperature settings for proper functionality.
Cole C.
Cole C. Checked in
Responded to no cooling complaint with system blowing warm air. Performed diagnostic evaluation of air handler and ductwork system. Verified adequate airflow through supply vents with no ice buildup present on evaporator coil or surrounding components. Inspected thermostat operation and temperature settings for proper functionality.
Owensboro, KY 42303
Conducted on-site plumbing assessment for kitchen and bathroom renovation project. Evaluated existing stainless steel double basin kitchen sink with chrome faucet and spray nozzle, inspecting supply lines and drain connections beneath decorative lattice cabinet panel. Assessed condition of drain lines and determined scope of work required for complete pipe rework. 

In bathroom, evaluated plumbing infrastructure serving vanity with oval sink basin, toilet, and bathtub/shower enclosure. Inspected existing drain lines and supply piping to determine extent of replacement needed. Provided comprehensive estimate for reworking water supply pipes, drain lines, and potential fixture replacement in both kitchen sink and bathroom areas to address plumbing system deficiencies and meet current code requirements.
Conducted on-site plumbing assessment for kitchen and bathroom renovation project. Evaluated existing stainless steel double basin kitchen sink with chrome faucet and spray nozzle, inspecting supply lines and drain connections beneath decorative lattice cabinet panel. Assessed condition of drain lines and determined scope of work required for complete pipe rework. 

In bathroom, evaluated plumbing infrastructure serving vanity with oval sink basin, toilet, and bathtub/shower enclosure. Inspected existing drain lines and supply piping to determine extent of replacement needed. Provided comprehensive estimate for reworking water supply pipes, drain lines, and potential fixture replacement in both kitchen sink and bathroom areas to address plumbing system deficiencies and meet current code requirements.
Isaac G.
Isaac G. Checked in
Conducted on-site plumbing assessment for kitchen and bathroom renovation project. Evaluated existing stainless steel double basin kitchen sink with chrome faucet and spray nozzle, inspecting supply lines and drain connections beneath decorative lattice cabinet panel. Assessed condition of drain lines and determined scope of work required for complete pipe rework. In bathroom, evaluated plumbing infrastructure serving vanity with oval sink basin, toilet, and bathtub/shower enclosure. Inspected existing drain lines and supply piping to determine extent of replacement needed. Provided comprehensive estimate for reworking water supply pipes, drain lines, and potential fixture replacement in both kitchen sink and bathroom areas to address plumbing system deficiencies and meet current code requirements.
Owensboro, KY 42303
Conducted comprehensive replacement estimate for aging HVAC system over 15 years old that is currently operational but nearing end of service life. Evaluated existing thermostat wiring configuration showing 24VAC connections with standard color-coded wiring to terminal block, and assessed electrical service panel with main breaker and circuit distribution to ensure adequate power supply for new equipment installation. Documented system specifications and captured detailed photos of control wiring and electrical infrastructure to develop accurate replacement proposal and equipment sizing recommendations.
Conducted comprehensive replacement estimate for aging HVAC system over 15 years old that is currently operational but nearing end of service life. Evaluated existing thermostat wiring configuration showing 24VAC connections with standard color-coded wiring to terminal block, and assessed electrical service panel with main breaker and circuit distribution to ensure adequate power supply for new equipment installation. Documented system specifications and captured detailed photos of control wiring and electrical infrastructure to develop accurate replacement proposal and equipment sizing recommendations.
James W.
James W. Checked in
Conducted comprehensive replacement estimate for aging HVAC system over 15 years old that is currently operational but nearing end of service life. Evaluated existing thermostat wiring configuration showing 24VAC connections with standard color-coded wiring to terminal block, and assessed electrical service panel with main breaker and circuit distribution to ensure adequate power supply for new equipment installation. Documented system specifications and captured detailed photos of control wiring and electrical infrastructure to develop accurate replacement proposal and equipment sizing recommendations.
Owensboro, KY 42303
Responded to no cooling call on 3-year-old system with frozen evaporator coil. Upon arrival, confirmed ice buildup and instructed occupant to switch system to fan-only mode to initiate defrost process. Inspected White-Rodgers InteliHARMONY control board for proper operation and verified all electrical connections and wiring terminals were secure. Property has secondary cooling system available during defrost period.
Responded to no cooling call on 3-year-old system with frozen evaporator coil. Upon arrival, confirmed ice buildup and instructed occupant to switch system to fan-only mode to initiate defrost process. Inspected White-Rodgers InteliHARMONY control board for proper operation and verified all electrical connections and wiring terminals were secure. Property has secondary cooling system available during defrost period.
Cole C.
Cole C. Checked in
Responded to no cooling call on 3-year-old system with frozen evaporator coil. Upon arrival, confirmed ice buildup and instructed occupant to switch system to fan-only mode to initiate defrost process. Inspected White-Rodgers InteliHARMONY control board for proper operation and verified all electrical connections and wiring terminals were secure. Property has secondary cooling system available during defrost period.
Owensboro, KY 42301
Conducted comprehensive assessment of 35-year-old central air conditioning and heating system experiencing severe temperature imbalances throughout multi-level residence. Evaluated outdoor condenser unit, basement furnace installation, existing ductwork infrastructure, and electrical service capacity via Frank Adam panel to determine full system replacement requirements and provide detailed estimate for new HVAC equipment and complete duct replacement to resolve uneven cooling issues.
Conducted comprehensive assessment of 35-year-old central air conditioning and heating system experiencing severe temperature imbalances throughout multi-level residence. Evaluated outdoor condenser unit, basement furnace installation, existing ductwork infrastructure, and electrical service capacity via Frank Adam panel to determine full system replacement requirements and provide detailed estimate for new HVAC equipment and complete duct replacement to resolve uneven cooling issues.
James W.
James W. Checked in
Conducted comprehensive assessment of 35-year-old central air conditioning and heating system experiencing severe temperature imbalances throughout multi-level residence. Evaluated outdoor condenser unit, basement furnace installation, existing ductwork infrastructure, and electrical service capacity via Frank Adam panel to determine full system replacement requirements and provide detailed estimate for new HVAC equipment and complete duct replacement to resolve uneven cooling issues.
Owensboro, KY 42303
Completed comprehensive assessment of 16-year-old HVAC system for residential property exceeding 2200 square feet with heating and cooling equipment located in interior closet. Evaluated existing Lennox natural gas furnace and outdoor condensing unit, both showing age-related wear consistent with end-of-service-life equipment. Documented current system configuration including ductwork, air handler, and electrical disconnect. Prepared two replacement options per customer request: first option for air conditioning system replacement only, second option for complete furnace and air conditioning system replacement. Conducted thorough equipment inspection, captured photographic documentation of indoor and outdoor components, and provided detailed specifications for replacement equipment suitable for large-footprint residential application with natural gas energy source.
Completed comprehensive assessment of 16-year-old HVAC system for residential property exceeding 2200 square feet with heating and cooling equipment located in interior closet. Evaluated existing Lennox natural gas furnace and outdoor condensing unit, both showing age-related wear consistent with end-of-service-life equipment. Documented current system configuration including ductwork, air handler, and electrical disconnect. Prepared two replacement options per customer request: first option for air conditioning system replacement only, second option for complete furnace and air conditioning system replacement. Conducted thorough equipment inspection, captured photographic documentation of indoor and outdoor components, and provided detailed specifications for replacement equipment suitable for large-footprint residential application with natural gas energy source.
James W.
James W. Checked in
Completed comprehensive assessment of 16-year-old HVAC system for residential property exceeding 2200 square feet with heating and cooling equipment located in interior closet. Evaluated existing Lennox natural gas furnace and outdoor condensing unit, both showing age-related wear consistent with end-of-service-life equipment. Documented current system configuration including ductwork, air handler, and electrical disconnect. Prepared two replacement options per customer request: first option for air conditioning system replacement only, second option for complete furnace and air conditioning system replacement. Conducted thorough equipment inspection, captured photographic documentation of indoor and outdoor components, and provided detailed specifications for replacement equipment suitable for large-footprint residential application with natural gas energy source.
Owensboro, KY 42303
Completed planned HVAC maintenance on dual system setup including mini-split unit located in workshop area. Noted need to return with pump-up pads for installation beneath outdoor mini-split condenser unit on next scheduled heating maintenance visit. Washable filter maintenance required on mini-split system during follow-up service call.
Completed planned HVAC maintenance on dual system setup including mini-split unit located in workshop area. Noted need to return with pump-up pads for installation beneath outdoor mini-split condenser unit on next scheduled heating maintenance visit. Washable filter maintenance required on mini-split system during follow-up service call.
Jeremiah H.
Jeremiah H. Checked in
Completed planned HVAC maintenance on dual system setup including mini-split unit located in workshop area. Noted need to return with pump-up pads for installation beneath outdoor mini-split condenser unit on next scheduled heating maintenance visit. Washable filter maintenance required on mini-split system during follow-up service call.
Owensboro, KY 42301
Completed follow-up visit for previously installed thermostat where initial maintenance work remained outstanding. Verified smart thermostat installation and configuration, confirmed Wi-Fi connectivity to SpectrumSetup-3D network, validated system settings interface functionality, and ensured automatic updates feature enabled and operational for proper system performance.
Completed follow-up visit for previously installed thermostat where initial maintenance work remained outstanding. Verified smart thermostat installation and configuration, confirmed Wi-Fi connectivity to SpectrumSetup-3D network, validated system settings interface functionality, and ensured automatic updates feature enabled and operational for proper system performance.
Tyler C.
Tyler C. Checked in
Completed follow-up visit for previously installed thermostat where initial maintenance work remained outstanding. Verified smart thermostat installation and configuration, confirmed Wi-Fi connectivity to SpectrumSetup-3D network, validated system settings interface functionality, and ensured automatic updates feature enabled and operational for proper system performance.
Owensboro, KY 42303
Owensboro, KY - Returned to site to complete financing process for indoor air quality equipment that was not finalized during original planned maintenance visit. Successfully processed and submitted credit application, which received approved status for equipment financing with established payment terms and credit limit.
Cole C.
Cole C. Checked in
Returned to site to complete financing process for indoor air quality equipment that was not finalized during original planned maintenance visit. Successfully processed and submitted credit application, which received approved status for equipment financing with established payment terms and credit limit.
Owensboro, KY 42303
Completed Platinum Level annual maintenance on single-system HVAC unit with customer authorization to service outdoor equipment prior to arrival. Performed comprehensive inspection of outdoor condenser unit including electrical control board, capacitor, wiring connections, and fan assembly. Verified system level, inspected all electrical components and wire terminations, documented equipment condition with photos, and replaced 20x20x5 air filter. All components found operating within normal parameters and system left in proper working condition.
Completed Platinum Level annual maintenance on single-system HVAC unit with customer authorization to service outdoor equipment prior to arrival. Performed comprehensive inspection of outdoor condenser unit including electrical control board, capacitor, wiring connections, and fan assembly. Verified system level, inspected all electrical components and wire terminations, documented equipment condition with photos, and replaced 20x20x5 air filter. All components found operating within normal parameters and system left in proper working condition.
Tyler C.
Tyler C. Checked in
Completed Platinum Level annual maintenance on single-system HVAC unit with customer authorization to service outdoor equipment prior to arrival. Performed comprehensive inspection of outdoor condenser unit including electrical control board, capacitor, wiring connections, and fan assembly. Verified system level, inspected all electrical components and wire terminations, documented equipment condition with photos, and replaced 20x20x5 air filter. All components found operating within normal parameters and system left in proper working condition.
Owensboro, KY 42303
Completed Platinum Level annual maintenance on residential HVAC system and mini-split unit in shop area. Performed comprehensive inspection of newly installed system, including verification of thermostat connectivity status showing Venstar v5d thermostat properly connected to Wi-Fi network with confirmed communication to all system components. Installed new 20x25 air filter in main air handler unit and documented installation with tracking label. Inspected internal cabinet components, ductwork connections, and galvanized metal elbow joints for proper installation and operation. Cleaned and serviced mini-split unit located in shop as requested. All equipment operating within normal parameters with confirmed wireless connectivity and system communication functioning properly.
Completed Platinum Level annual maintenance on residential HVAC system and mini-split unit in shop area. Performed comprehensive inspection of newly installed system, including verification of thermostat connectivity status showing Venstar v5d thermostat properly connected to Wi-Fi network with confirmed communication to all system components. Installed new 20x25 air filter in main air handler unit and documented installation with tracking label. Inspected internal cabinet components, ductwork connections, and galvanized metal elbow joints for proper installation and operation. Cleaned and serviced mini-split unit located in shop as requested. All equipment operating within normal parameters with confirmed wireless connectivity and system communication functioning properly.
Tyler C.
Tyler C. Checked in
Completed Platinum Level annual maintenance on residential HVAC system and mini-split unit in shop area. Performed comprehensive inspection of newly installed system, including verification of thermostat connectivity status showing Venstar v5d thermostat properly connected to Wi-Fi network with confirmed communication to all system components. Installed new 20x25 air filter in main air handler unit and documented installation with tracking label. Inspected internal cabinet components, ductwork connections, and galvanized metal elbow joints for proper installation and operation. Cleaned and serviced mini-split unit located in shop as requested. All equipment operating within normal parameters with confirmed wireless connectivity and system communication functioning properly.
Owensboro, KY 42301
Responded to service call for non-functioning air conditioning system requiring replacement estimate and second opinion. Upon arrival, conducted thorough assessment of existing HVAC equipment and infrastructure. Inspected current thermostat installation, identifying Nest smart thermostat with multi-stage system wiring including Y1, Y2, G, OB, RC, W1, W2, C, and RH terminals properly connected. Evaluated existing ductwork connections and condensate drain line configuration in mechanical space. Documented equipment clearances and measured available installation space for replacement system sizing considerations. Photographed thermostat wiring configuration to ensure proper compatibility with replacement equipment specifications. Assessed mechanical room layout and existing pipe connections to determine optimal replacement unit positioning. Reviewed system requirements and discussed replacement options with homeowner based on current equipment failure and home comfort needs. Provided prof
Responded to service call for non-functioning air conditioning system requiring replacement estimate and second opinion. Upon arrival, conducted thorough assessment of existing HVAC equipment and infrastructure. Inspected current thermostat installation, identifying Nest smart thermostat with multi-stage system wiring including Y1, Y2, G, OB, RC, W1, W2, C, and RH terminals properly connected. Evaluated existing ductwork connections and condensate drain line configuration in mechanical space. Documented equipment clearances and measured available installation space for replacement system sizing considerations. Photographed thermostat wiring configuration to ensure proper compatibility with replacement equipment specifications. Assessed mechanical room layout and existing pipe connections to determine optimal replacement unit positioning. Reviewed system requirements and discussed replacement options with homeowner based on current equipment failure and home comfort needs. Provided prof
Nick B.
Nick B. Checked in
Responded to service call for non-functioning air conditioning system requiring replacement estimate and second opinion. Upon arrival, conducted thorough assessment of existing HVAC equipment and infrastructure. Inspected current thermostat installation, identifying Nest smart thermostat with multi-stage system wiring including Y1, Y2, G, OB, RC, W1, W2, C, and RH terminals properly connected. Evaluated existing ductwork connections and condensate drain line configuration in mechanical space. Documented equipment clearances and measured available installation space for replacement system sizing considerations. Photographed thermostat wiring configuration to ensure proper compatibility with replacement equipment specifications. Assessed mechanical room layout and existing pipe connections to determine optimal replacement unit positioning. Reviewed system requirements and discussed replacement options with homeowner based on current equipment failure and home comfort needs. Provided prof
Owensboro, KY 42301
Completed comprehensive HVAC system replacement estimate for residential property with non-functioning existing equipment. Assessed current furnace/air handler unit located in interior utility closet, evaluated existing ductwork configuration, and documented copper refrigerant line routing and ventilation infrastructure. Performed detailed site inspection including measurement of installation space, examination of electrical service requirements, and assessment of existing supply and return air distribution system to provide homeowner with complete replacement system specifications and options.
Completed comprehensive HVAC system replacement estimate for residential property with non-functioning existing equipment. Assessed current furnace/air handler unit located in interior utility closet, evaluated existing ductwork configuration, and documented copper refrigerant line routing and ventilation infrastructure. Performed detailed site inspection including measurement of installation space, examination of electrical service requirements, and assessment of existing supply and return air distribution system to provide homeowner with complete replacement system specifications and options.
James W.
James W. Checked in
Completed comprehensive HVAC system replacement estimate for residential property with non-functioning existing equipment. Assessed current furnace/air handler unit located in interior utility closet, evaluated existing ductwork configuration, and documented copper refrigerant line routing and ventilation infrastructure. Performed detailed site inspection including measurement of installation space, examination of electrical service requirements, and assessment of existing supply and return air distribution system to provide homeowner with complete replacement system specifications and options.
Owensboro, KY 42301
Installed a 50-gallon State Water Heaters ProLine commercial-grade water heater in utility room with complete plumbing connections, gas line hookup, and proper venting. Unit includes 6-year parts warranty and 1-year labor warranty, with all connections secured to code and system tested for proper operation.
Installed a 50-gallon State Water Heaters ProLine commercial-grade water heater in utility room with complete plumbing connections, gas line hookup, and proper venting. Unit includes 6-year parts warranty and 1-year labor warranty, with all connections secured to code and system tested for proper operation.
Isaac G.
Isaac G. Checked in
Installed a 50-gallon State Water Heaters ProLine commercial-grade water heater in utility room with complete plumbing connections, gas line hookup, and proper venting. Unit includes 6-year parts warranty and 1-year labor warranty, with all connections secured to code and system tested for proper operation.
Owensboro, KY 42303
Owensboro, KY - Completed planned maintenance on 2-year-old residential air conditioning system. Performed system diagnostics using digital manifold gauges, measuring refrigerant pressures and temperatures to verify proper operation. All readings within manufacturer specifications, and unit operating as designed per seasonal conditions.
Jeff J.
Jeff J. Checked in
Completed planned maintenance on 2-year-old residential air conditioning system. Performed system diagnostics using digital manifold gauges, measuring refrigerant pressures and temperatures to verify proper operation. All readings within manufacturer specifications, and unit operating as designed per seasonal conditions.
Owensboro, KY 42303
Conducted comprehensive replacement estimate for aging HVAC system including 25-year-old furnace and older air conditioning unit. System currently operational but nearing end of service life. Documented existing equipment configuration including ceiling-mounted return air vent showing significant dust accumulation and digital thermostat displaying heat mode operation at 74 degrees.
Conducted comprehensive replacement estimate for aging HVAC system including 25-year-old furnace and older air conditioning unit. System currently operational but nearing end of service life. Documented existing equipment configuration including ceiling-mounted return air vent showing significant dust accumulation and digital thermostat displaying heat mode operation at 74 degrees.
Nick B.
Nick B. Checked in
Conducted comprehensive replacement estimate for aging HVAC system including 25-year-old furnace and older air conditioning unit. System currently operational but nearing end of service life. Documented existing equipment configuration including ceiling-mounted return air vent showing significant dust accumulation and digital thermostat displaying heat mode operation at 74 degrees.
Owensboro, KY 42303
Start Saving Today With

Membership Perks

Start Saving Today With

Membership Perks

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.

Review Image
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.