Since 1975, the A+ Derr Heating & Cooling professionals have been helping homeowners in Henderson, KY, with their HVAC services. As a 4th generation business, we’re committed to delivering superior quality work and customer service.
We want you to be comfortable in your home. That’s why we offer 24/7 emergency service. We also have a 100% satisfaction guarantee. If you’re unhappy with a product we installed after the 1st year, we’ll buy it back.
Get the best HVAC services in Henderson. Call A+ Derr at 833-232-4328 or contact us online to schedule an appointment today!
Our Heating Services
You need a hardworking and reliable heating system to stay warm during our cold Henderson winters. For expert heating system services, choose A+ Derr. Our experienced professionals can help you with any problem – from minor repairs to major fixes. Our heating services include installation, replacement, repair, and maintenance.
Our trained and experienced professionals are ready to help you maintain your equipment and heating system units. We service:
- Furnaces
- Boilers
- Heat pumps
- Geothermal units
- Packaged units
Air Conditioning Services
You count on your air conditioning system during the long summer months to keep you cool. At A+ Derr, our courteous and reliable technicians can help you keep your air conditioning system working properly. From ductless mini-splits to central air conditioning, we offer a comprehensive list of services to keep you and your family out of the summer heat in Henderson.
Our AC services include:
Schedule your heating system appointment today by calling A+ Derr at 833-232-4328 or contacting us online!

Signs You Need HVAC Service
It can help homeowners to know when their HVAC system isn’t working correctly. Here are some common signs that it’s time to call for trustworthy HVAC services. Common signs include:
- Strange noises If your HVAC system is making weird sounds like rattling, grinding, or squealing, it could mean that there is a worn or loose part that needs to be replaced or adjusted.
- Unusual odors If your HVAC system is giving off strange smells, there could be a buildup of dirt, dirt, or mold in the system or ducts.
- Inadequate heating or cooling If your HVAC system isn’t heating or cooling properly, you may have a clogged air filter, blocked ductwork, or a malfunctioning component.
- High energy bills Climbing energy bills are a sign your HVAC system isn’t running efficiently.
- Short-cycling: Short-cycling is when your system frequently turns on and off. This can happen from a malfunctioning thermostat, a clogged air filter, or a problem with the system’s compressor or fan.
For expert HVAC services in Henderson, count on A+ Derr. Call us at 833-232-4328 or contact us online for a free estimate today!
Indoor Air Quality in Henderson
Make the air in your Henderson home as clean as possible with indoor air quality services from A+ Derr. With proper tools and techniques, like duct cleaning, we can help you reduce the dust, allergens, bacteria, and other irritants in your ductwork.
Other benefits of duct cleaning include:
- Improved HVAC efficiency:Â Clean air ducts offer fewer blocks for your HVAC system, making it easier to heat and cool your home. This can lead to lower energy bills and improved comfort.
- Reduced fire risk:Â The buildup of dust and debris in your air ducts can increase the fire risk. Regular duct cleaning can help reduce the risk of a fire hazard.
- Longer HVAC life span:Â Clean ducts can help extend the life of your HVAC system and help keep it running efficiently for longer.
Get clean indoor air with A+ Derr. Contact us today at 833-232-4328 or schedule online today!
Why Choose A+ Derr?
At A+ Derr, we understand how much you care about your Henderson home. That’s why we ensure our technicians are certified and ready to deliver exceptional customer service. We stand behind our work with a 100% satisfaction guarantee.
We’ll work with you to find the best HVAC solutions for your needs and budget. Plus, we offer our Maintenance Plan for added convenience and cost savings.
When you choose A+ Derr, you choose the local experts committed to providing you peace of mind. Let us help you keep your home comfortable and safe all year round.Count on A+ Derr for your HVAC services in Henderson. Call us at 833-232-4328 or contact us online today!
Frequently Asked Questions
When should I have my HVAC system serviced?
You should have your heating system serviced before the cooling season and your cooling system before the heating system. If you have a system that both heats and cools, like a heat pump, it is recommended that you get professional service between the heating and cooling seasons.
Is good indoor air quality important to your home?
In short, indoor air quality is far more polluted than outdoor quality. These pollutants include allergens, dirt, mold, and much more. These contaminants affect your family’s health and, sometimes, sleep. Installing an air cleaner, purifier, or scrubber can improve your home’s air quality.
How often should I change my system’s air filters?
Air filters should be replaced at least every 90 days. However, you should replace your filters more often if:
- You have more than two pets that shed fur
- Someone in your home has respiratory issues
- Your home is in an area that has more allergens
Recent Jobs and Reviews in Henderson, KY
Job Locations and Reviews
Responded to no-cooling call on 5-year-old residential HVAC system. Found outdoor condenser fan attempting to start then immediately shutting down in rapid cycling pattern. Indoor blower motor operating normally with adequate airflow. Diagnosed failed run capacitor on condenser fan motor causing hard start condition and thermal overload protection activation. Replaced dual-run capacitor with OEM-equivalent component, verified proper microfarad rating and voltage specifications. Tested system operation through complete cooling cycle, confirmed condenser fan motor startup and continuous operation, verified compressor engagement and proper amperage draw on both legs. System restored to full cooling capacity with thermostat differential returning to normal range.
Conducted comprehensive replacement estimate for existing HVAC system that failed overnight. Evaluated outdoor condenser unit with weathered cylindrical design and indoor ventilation components showing dust accumulation. Assessed system configuration, ductwork accessibility, electrical infrastructure including exterior conduit box, equipment placement on concrete pad, and overall installation requirements to provide complete replacement options for non-functional heating and cooling system.
# HVAC Complete System Installation Successfully completed installation of a 4-ton, 17 SEER zoned HVAC system with 97% AFUE heating capability. The project included both indoor and outdoor equipment installation with proper refrigerant line routing and electrical connections. ## Indoor Installation Installed air handler unit with metallic silver finish in utility area, positioned vertically against interior wall. Mounted large white pyramidal plenum chamber above air handler to facilitate proper airflow distribution throughout the ductwork system. Ran dual white PVC condensate drain lines vertically alongside equipment to ensure proper drainage and prevent water damage. Installed wall-mounted white rectangular air return vent for adequate system circulation. Connected dark-colored heating unit with exposed copper refrigerant lines, properly insulated with black coating. Completed all electrical connections and verified proper component integration. Ensured all manufacturer labels a
Responded to no cooling call on 5-year-old residential HVAC system that would not power on. Upon arrival, diagnosed and resolved thermostat issue at Honeywell Home unit. System was successfully restored to operational status with proper airflow and cooling performance. Post-repair diagnostics confirmed R-410A refrigerant system operating within manufacturer specifications: return air at 78.3°F dry bulb with 60.6% relative humidity, supply air at 58.4°F producing 19.9°F temperature split, suction pressure at 142.6 PSIG with proper superheat, and liquid line pressure at 317.2 PSIG with adequate subcooling. System tested and left in full cooling operation with tenant satisfied.
Completed comprehensive equipment assessment for air conditioning system replacement estimate. Evaluated existing 13-year-old Carrier AC system, including indoor air handler unit mounted in utility closet and associated refrigerant lines, condensate drainage, and electrical connections. Documented current system configuration with furnace and water heater placement in mechanical closet. Inspected outdoor condensing unit age and condition. Photographed existing equipment installation, ductwork connections, and available workspace for replacement unit installation. Provided detailed replacement options and recommendations based on current system capacity requirements and home specifications.
Performed comprehensive assessment of existing residential HVAC system for replacement estimate. Evaluated 40-year-old air conditioning unit located exterior to residence, documenting original equipment from 1980s-1990s era that has reached end of serviceable life. Inspected York furnace installation in interior utility space, noting condensation accumulation on vertical plenum component and flexible ductwork connections. Photographed existing equipment configuration including indoor air handler placement in confined utility area with wooden enclosure and outdoor condensing unit location accessible via rear alley approach. Documented current system specifications, installation conditions, and spatial constraints to provide accurate replacement equipment recommendations and installation requirements for complete air conditioning system upgrade.
Conducted comprehensive replacement estimate for existing HVAC system including Airtemp condenser unit located on exterior concrete pad and attic air handler installation. Evaluated current system configuration, ductwork accessibility in attic space, refrigerant line routing, electrical disconnect placement, and equipment placement conditions to provide homeowner with complete system replacement options.
Conducted comprehensive HVAC replacement estimate for non-functioning residential heating and cooling system located in basement mechanical room. Assessed existing greenish-gray furnace/air handler unit with associated ductwork and determined replacement requirements. Documented current equipment configuration including filtration system utilizing 16x25x1 Filtrete filter showing significant dust accumulation and debris buildup, indicating maintenance concerns with existing system.
Conducted on-site evaluation for replacement of 10-year-old electric heat pump and electric furnace system. Documented existing electrical panel configuration and circuit breaker layout, photographed current 16x20x1 air filter installation in return air duct, and assessed overall HVAC system condition to provide comprehensive replacement estimate.
Responded to no cooling call on 22-year-old system with complete loss of power and non-responsive thermostat. Upon arrival, confirmed outdoor condenser unit and indoor air handler had no power. Customer reported possible wire damage near outdoor unit from weed trimming activity. Traced low-voltage wiring from thermostat through air handler to outdoor disconnect and located severed thermostat wire approximately 18 inches from condenser unit where landscape maintenance had occurred. Repaired damaged 18/5 thermostat control wire, restored all connections, and verified proper voltage at thermostat base and equipment terminals. Cycled system through complete operational test including compressor startup, blower motor function, and thermostat communication. All components responded correctly with normal amp draws. System restored to full cooling operation with proper airflow and refrigerant cycling. Advised property owner of repair completion and recommended care around low-voltage wiring du
Conducted estimate for upstairs mini split system replacement at residential property. Customer currently has operational HVAC system and is seeking budget-friendly ductless solution for second floor. Assessed existing electrical infrastructure including main panel location in basement utility area and evaluated outdoor condensing unit placement adjacent to building foundation. Documented electrical capacity, reviewed available mounting locations for indoor air handlers, and discussed financing options to proceed with installation.
Conducted comprehensive assessment of existing HVAC system for replacement estimate. Documented current equipment configuration including wall-mounted control board with visible circuit components, terminal connections, and wiring layout. Photographed mechanical room setup featuring existing heating unit on wooden platform, associated electrical panels, copper refrigerant lines, gas supply connections, and air filtration components to provide detailed scope for Green A+ rated replacement system proposal.
Responded to callback for non-operational condenser following recent condensate pump replacement. Upon arrival, verified previous repair work and diagnosed issue with outdoor unit. Inspected and tested capacitor, confirmed proper electrical connections, and restored full system operation. Cycled unit multiple times to verify reliable performance with proper temperature differential across evaporator coil.
Completed Platinum Level annual maintenance on single-system residential HVAC unit with 16x25x5 filter configuration. Performed comprehensive inspection of control board components, terminal connections, and electrical wiring; verified proper operation of relays and control circuits. Documented system condition and confirmed all mechanical and electrical components functioning within normal parameters.
Conducted comprehensive site evaluation for heat pump replacement installation in barn structure. Assessed existing electrical infrastructure including 200-amp service panel with adequate breaker capacity and verified proper grounding and wiring configurations to support new heat pump system requirements. Documented utility room layout, available mounting locations, and clearance specifications for indoor air handler placement near existing mechanical equipment and utility sink area. Photographed electrical service panel to confirm compatibility with heat pump electrical demands and documented spatial constraints within corrugated metal building to ensure proper equipment sizing and installation accessibility for replacement system.
Responded to no cooling complaint on residential HVAC system. Upon inspection, diagnosed failed blower motor assembly with compromised blower wheel showing excessive dirt accumulation and motor failure. Removed blower motor and wheel assembly from air handler for replacement. Documented model and serial number information, took measurements of ductwork clearances, and photographed failed components. Parts have been ordered for follow-up installation requiring approximately 90 minutes for completion.
Responded to no-cooling complaint following recent power outage. Performed system diagnostics and identified low refrigerant charge as primary issue affecting cooling performance. System requires additional R22 refrigerant to properly balance and restore optimal operation; scheduled follow-up visit to complete refrigerant charge and verify system performance.
Responded to report of intermittent gas odor near 40-year-old furnace. Upon arrival, performed comprehensive gas leak detection inspection of furnace and surrounding gas piping using electronic combustible gas detector. Inspected all gas connections, unions, and fittings at furnace inlet and throughout the gas train. Checked water heater gas connections and piping in adjacent utility area, noting aged galvanized and brass fittings with visible corrosion. Applied leak detection solution to all suspect joints and connections. No active gas leaks detected at time of inspection. Verified proper furnace burner operation and flame characteristics. Inspected heat exchanger for cracks or breaches that could cause combustion gas odor. Educated customer on difference between natural gas odor and combustion gases, and recommended monitoring for recurrence of odor to pinpoint source during active leak condition. Advised contacting gas utility company for meter and exterior line inspection if odor
Responded to no cooling call on 6-year-old residential HVAC system. Upon arrival, confirmed air handler in basement was not activating and no airflow was present at supply registers. Performed diagnostic evaluation of electrical components, thermostat communication, and control board functionality. Identified failed control board preventing system startup. Replaced defective control board, restored power, and cycled system through complete startup sequence. Verified proper thermostat response, confirmed air handler operation, and ensured adequate airflow through ductwork. System restored to normal cooling operation.
Conducted on-site electrical estimate for standby generator installation at rural residential property with propane fuel source and existing breaker panel. Evaluated exterior utility area and identified suitable location near agricultural outbuilding for generator placement. Assessed existing copper gas line infrastructure showing oxidation and corrosion that will require consideration during installation planning. Documented site conditions including gravel service area, proximity to structure, and accessibility for equipment placement and future maintenance. Confirmed homeowner presence during estimate consultation to ensure proper communication of electrical requirements and generator specifications.