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
Conducted on-site evaluation of 20+ year old residential air conditioning system for replacement estimate. Outdoor condenser unit exhibited severe deterioration including damaged fan grille with warped metal mesh, loose electrical connections, and significant wear on exterior casing. Documented equipment condition and assessed indoor components including evaporator coil accessibility in basement utility area. Provided comprehensive replacement recommendations for complete system upgrade due to age and deteriorated condition of existing equipment.
Completed comprehensive HVAC system replacement estimate for residential property. Evaluated existing outdoor condenser unit and multi-zone control system with HZ311 zone controller managing three separate zones. Documented current equipment configuration including thermostat control panel, zone damper wiring, refrigerant line connections, electrical disconnect, and outdoor unit placement on concrete pad. Photographed all major system components to support replacement recommendations and provided estimate for complete system replacement.
Completed first annual Platinum Level maintenance on a single-system residential HVAC unit. The outdoor condensing unit is an American Standard 2WCX3036A1000AA model manufactured in September 2006, utilizing R-22 refrigerant and rated for 208/230V operation. Performed comprehensive inspection and preventive maintenance procedures on the approximately 10-year-old heat pump system. Collected filter size information for future service reference. System operational and functioning within manufacturer specifications upon completion of maintenance visit.
Responded to no cooling complaint with no airflow through vents. Upon inspection, diagnosed failed condenser fan motor blade preventing proper air circulation through the outdoor unit. Documented fan blade dimensions and condition with measurements for accurate replacement part ordering. System age undetermined but estimated under 10 years based on property information. Unit currently inoperable and requires follow-up appointment to install replacement fan blade under warranty coverage, with estimated repair time of one hour once part arrives.
Completed installation of 2-ton, 19 SEER heat pump system in single-family residence. Installed new air handler unit in attic space on elevated platform with proper clearances, connected flexible ductwork throughout attic to existing distribution system, and ensured adequate insulation coverage around equipment. Positioned outdoor heat pump condenser unit on concrete pad against building exterior, established electrical connections via wall-mounted disconnect box, ran refrigerant lines and condensate drainage, and verified all components operational per manufacturer specifications.
Responded to a no cooling complaint on a 3-year-old system that was running continuously but not maintaining setpoint, with thermostat set to 68°F while reading 73°F and blowing warm air from vents. Customer reported previous ice buildup around the indoor coil area that had since melted. Upon inspection, diagnosed low refrigerant charge causing reduced cooling capacity and previous evaporator coil freeze-up. Located and repaired refrigerant leak at pipe connection fitting, evacuated system, and recharged to manufacturer specifications. Verified proper airflow, temperature split, and system operation with unit now cooling effectively and maintaining desired temperature.
Responded to no cooling complaint on 23-year-old WaterFurnace geothermal system with IntelliZone zoned comfort control. System was providing insufficient cooling to entire home. Performed diagnostic evaluation of geothermal heat pump, air handler, and zone control system. Inspected compressor operation, refrigerant circuit, water loop connections, and airflow distribution through black flex duct connections. Verified no ice buildup on coils and confirmed system was operational but not meeting capacity demands. Documented existing equipment configuration including gray insulated air handler and white zone control junction connections. Discussed system age, declining performance characteristics typical of equipment exceeding 20-year service life, and provided customer with replacement options including Bosch, Geo Comfort, and ClimateMaster geothermal systems as alternatives to continued repairs on aging equipment.
Conducted comprehensive evaluation of existing HVAC system for complete heating and cooling replacement estimate. Assessed 64-year-old furnace and air conditioning units dating from approximately 1962. Documented outdoor condenser unit condition, electrical disconnect, and mounting configuration on concrete pad. Performed interior inspection including ductwork measurements and system component assessment. Photographed existing equipment placement, electrical connections, and duct dimensions to determine proper sizing requirements for replacement system. Provided detailed replacement recommendations for both heating and air conditioning equipment to modernize home comfort system.
Responded to no cooling complaint on 10+ year old residential air conditioning system. Customer reported condenser fan blades not spinning; contactor had been previously replaced but unit failed again. Performed diagnostic evaluation of outdoor condensing unit, inspected electrical components, contactor operation, and fan motor assembly to identify root cause of intermittent cooling failure and restore proper system operation.
Completed comprehensive HVAC replacement estimate for residential property with 20-year-old existing system. Evaluated outdoor condensing unit positioned on concrete pad against exterior wall, noting copper refrigerant lines, electrical conduit routing, and wall-mounted disconnect box. Assessed electrical service panel configuration, verifying adequate breaker capacity and available expansion slots for potential new equipment installation requirements.
Completed installation of an 18kW Generac standby generator system at residential property. Unit was positioned on prepared gravel pad adjacent to house foundation with proper clearances maintained from structure and property boundaries. Leveling procedures were performed using precision instruments to ensure generator sits on stable, level concrete base per manufacturer specifications. All electrical connections were made in accordance with NEC requirements, including proper bonding and grounding of the system. Generator placement allows adequate ventilation clearance and accessibility for future maintenance while maintaining aesthetic integration with existing landscaping and privacy fencing.
Responded to service call for attic HVAC system that was previously reported low on refrigerant but inaccessible during initial visit. Accessed attic unit and conducted thorough system inspection, documenting significant ductwork deterioration with visible moisture damage, discoloration, and potential microbial growth on interior duct surfaces. Measured duct openings and assessed overall system condition, capturing photographic evidence of compromised ductwork integrity and contamination patterns throughout accessible areas. Completed comprehensive evaluation that was unable to be performed during original planned maintenance visit due to access constraints.
Conducted comprehensive on-site evaluation for whole-house generator installation at residential property equipped with natural gas service and breaker panel. Assessed existing electrical infrastructure including main service meter, exterior conduit routing, and utility connections mounted on brick exterior wall. Documented current electrical service configuration, meter location, gas line accessibility, and optimal placement considerations for standby generator system. Evaluated weathered utility components and determined requirements for transfer switch installation, load calculations, and integration with existing electrical distribution system.
Conducted comprehensive replacement estimate for non-functional HVAC system that had lost all refrigerant charge due to leak and utilizes obsolete refrigerant no longer available for service. Evaluated existing outdoor condensing unit showing visible corrosion and weathering on cabinet panels, assessed indoor ductwork and air handler components in basement mechanical space, and documented current system configuration. Provided complete replacement options to restore cooling capacity to residence.
Completed Platinum Level maintenance on a 4-year-old residential HVAC system with 20x25x5 filter specification. Performed comprehensive inspection of furnace unit, ductwork, and associated components including PVC condensate drain lines and plenum assembly. Verified proper system operation and documented equipment condition with photographic records per maintenance protocol standards.
Completed Platinum Level maintenance on two HVAC systems (2 years and 15 years old) as part of annual preventive maintenance program. Performed comprehensive inspection and service of both units, replaced air filters with 20x25x1 polarized and 20x20x5 filters per system specifications. Verified thermostat operation and settings, inspected furnace components and ductwork, confirmed proper airflow and system functionality on both units.
Responded to gas odor complaint originating from fireplace area with occasional smell reported. Conducted comprehensive gas leak inspection of natural gas meter, exterior piping connections, water heater gas supply lines, and fireplace gas valve assembly. Performed leak detection testing using combustible gas detector at all accessible gas connections, joints, and fittings. Inspected water heater gas flex connector, brass fittings, and shut-off valve for integrity and proper installation. Verified gas meter connections and exterior piping showed no signs of leakage following recent utility company meter replacement work. Examined fireplace gas log system and associated gas valve components for potential leak sources. All testing confirmed no active gas leaks detected at time of inspection. System deemed safe for operation with gas supply restored.
Completed annual Platinum Level preventive maintenance on single-system residential HVAC unit requiring 16x25x5 filter. Performed comprehensive inspection of furnace assembly, blower motor, electrical connections, and condensate drainage system. All components found operating within normal parameters, wiring harnesses properly secured, and system ready for continued service.
Completed annual Platinum Level maintenance on a 1-year-old Lennox air conditioning system located on exterior concrete pad. Performed comprehensive inspection of condenser unit, replaced 16x25x5 filter, verified system operation, and documented equipment condition with photos as part of first-year preventive maintenance visit.
# HVAC Maintenance Completed Performed annual planned maintenance on a one-year-old Lennox air handler system. Conducted comprehensive system inspection including filter evaluation, refrigerant line assessment, and electrical component verification using digital testing equipment. Identified and documented moisture damage and potential mold growth in the unit's base area requiring future attention, while all mechanical components operated within normal parameters.