At A+ Derr Heating & Cooling, we understand the importance of good service in Mount Washington and Louisville, and we’re here to keep your home comfortable and hassle-free all year round.
We take pride in caring for our customers promptly and professionally. Don’t take our word for it — check out what your neighbors are saying about trusting A+ Derr with their HVAC and generator needs.
Contact A+ Derr Heating & Cooling today to request an appointment or get a FREE system replacement quote.
Top-Rated Air Conditioning
When temperatures rise in Mount Washington, cool air becomes essential for comfort and safety. Our expert team provides a range of air conditioning services to keep your home cool and energy-efficient.- Repair: Quick and reliable repairs to ensure your AC runs smoothly throughout the hot summer months.
- Replacement: Expert guidance and installation of new, energy-efficient air conditioning systems tailored to your home’s needs.
- Maintenance: Extends your AC unit’s lifespan and prevents costly breakdowns.
- Ductless systems: An alternative to central air that offers zoned temperature control.
Heating Repair & Replacement
Staying warm during the freezing winter months is a priority. A+ Derr Heating & Cooling offers comprehensive heating repair, installation, and maintenance solutions to keep your home comfortable when temperatures drop:Indoor Air Quality Solutions
Maintaining excellent indoor air quality is essential for your family’s comfort and health. From duct cleaning to air purifiers, and whole-house humidifiers to dehumidifiers, A+ Derr provides comprehensive indoor air quality solutions. Our advanced systems will help remove unwanted allergens from the air as well as control excess humidity, preventing mold and mildew so you can breathe easier.
24/7 Emergency Service
(833) 232-4328
Whole-Home Generators
Standby generators are an excellent option for homeowners looking to stay safe and secure all year. By installing one, you can rest assured knowing you’ll always have access to power, even when the weather or your power grid fails you. You should especially consider a whole-house generator if you have family members in your home who are sensitive to heat, like young children or older adults. Another good reason is if you have any appliances or equipment that must stay on all the time. We work with Generac to provide the best installation service with systems from the best brand in the industry.Schedule in Mount Washington Today!
As a fourth-generation family-operated company, we take pride in serving families and making sure their homes are functioning smoothly and reliably. With our “service today or you don’t pay!” commitment and our 100% satisfaction guarantee, you can have peace of mind knowing that if you’re not satisfied with the product installed by us within the first year, we’ll buy it back. To help keep your home comfort needs affordable we offer free estimates on replacement quotes, flexible financing, and special promotions. Let our expert team handle all your HVAC and generator needs with professionalism and care. Contact A+ Derr to schedule service!FAQs
Are ductless mini-splits good for cooling in Kentucky?
Ductless mini-splits are excellent for cooling in Kentucky due to their energy efficiency and flexibility. They provide targeted cooling, which is ideal for our variable climate, offering both cooling during hot summers and supplemental heating in colder months. Their compact size and ability to zone cooling make them a practical choice for homes where ductwork installation may be challenging.
How long does it take to install a new furnace?
Installing a new furnace usually takes anywhere from four to 10 hours. It depends on what kind of furnace you’re getting, how complicated the setup is, and if any ductwork needs tweaking. Our team at A+ Derr Heating & Cooling hustles to get it done efficiently, keeping your home comfortable with minimal fuss.
Do I need a humidifier or dehumidifier?
Whether you need a humidifier or dehumidifier depends on how your home feels humidity-wise. In Kentucky, where the weather swings, a humidifier can be a lifesaver during dry winters, keeping things cozy. On the flip side, a dehumidifier helps beat the mugginess in summer, keeping air fresh and mold-free.
Recent Jobs and Reviews in Mount Washington, KY
Job Locations and Reviews
Brad H.
Conducted comprehensive estimate for complete HVAC system replacement on 18-year-old failed unit. Homeowner currently utilizing window units for temporary cooling due to system failure. Assessed existing equipment installation including air handler with ductwork connections, electrical components, and associated mechanical infrastructure in utility space. Evaluated water heater plumbing configuration and existing copper and PEX piping layout to coordinate bundled water heater promotion with air conditioning system replacement. Documented existing conditions through photographic survey of mechanical room showing air handler assembly, ductwork connections, electrical junction boxes, and plumbing infrastructure. Provided homeowner with equipment options and replacement recommendations for full system installation, discussing bundled water heater incentive program with new AC installation.
Mount Washington, KY 40047
Jordyn R.
Completed scheduled maintenance inspection on both furnace and air conditioning system, with both units approximately two years old. Performed comprehensive AC tune-up including inspection of outdoor condenser unit, verification of electrical connections, and assessment of control board components and wiring harnesses. All systems operating within normal parameters with no issues identified. Unit exterior and internal components show appropriate condition for age with proper installation on concrete pad with adequate drainage. Maintenance plan service completed as scheduled with photographic documentation of equipment condition.
Mount Washington, KY 40047
Neal H.
Responded to no cooling call on 4-year-old residential air conditioning system with outdoor unit completely inoperative. Upon arrival, verified outdoor condenser unit had no power and was not running despite homeowner's previous attempts to reset breaker. Inspected main electrical panel and located dedicated AC circuit breaker in proper position. Proceeded to outdoor disconnect and found CoreSense Air Controls hard start capacitor device with illuminated LED indicator, suggesting control board had power but was not sending signal to compressor contactor. Diagnosed failed compressor contactor coil preventing outdoor unit from receiving proper voltage. Replaced defective contactor with new component, restored power to system, and verified compressor and condenser fan motor started properly. Tested system operation through complete cooling cycle, confirmed proper amperage draw on all components, and verified thermostat communication with outdoor unit. System restored to full operational s
Mount Washington, KY 40047
Jordyn R.
Completed scheduled AC tune-up and preventative maintenance on residential air conditioning system. Performed comprehensive electrical diagnostics using Fieldpiece SC260 meter to verify proper voltage, amperage, and system performance at the air handler unit. Inspected and documented all electrical connections, terminal blocks, and wiring configurations within the equipment to ensure safe operation and compliance with manufacturer specifications.
Mount Washington, KY 40047
Anthony L.
Responded to callback for non-operational HVAC system in basement with blower motor/module failure. Upon inspection, found extensive frost and ice buildup on evaporator coils and copper refrigerant lines, indicating airflow restriction from blower malfunction. Documented equipment condition with photos showing frozen coil assembly and interior cabinet components. Confirmed blower relay and motor/module assembly required replacement. Ordered necessary parts for pickup, with estimated repair time of 120 minutes upon part arrival. System remains non-operational pending component installation.
Mount Washington, KY 40047
Anthony L.
Completed annual second visit Platinum Level maintenance on a 4-year-old HVAC system with 20x20x5 filter configuration. Performed comprehensive inspection of indoor air distribution components including ceiling-mounted supply register with adjustable louvers and damper control mechanism. Conducted thorough examination of outdoor condensing unit, accessing electrical compartment to inspect contactor assembly, wiring connections, and control components. All electrical connections verified secure with proper voltage readings. Cleaned condenser coils, checked refrigerant pressures within manufacturer specifications, and confirmed proper system operation. Unit operating efficiently with no deficiencies noted.
Mount Washington, KY 40047
Paul G.
Responded to install callback for reported gas odor in basement furnace room. Upon arrival, inspected recent furnace installation and gas line connections. Located source of gas smell at flexible gas connector fitting to furnace inlet. Tightened connection at appliance connector and black iron pipe assembly, verified proper seal with leak detection solution, and confirmed no further gas odor present. System remained operational throughout service call with all components functioning properly.
Mount Washington, KY 40047
Jordyn R.
Responded to callback for HVAC system not operating following previous repair from 4/27. Upon inspection, discovered extensive frost and ice buildup throughout evaporator compartment and drain pan area, indicating restricted airflow or refrigerant issue causing coil to freeze. Inspected low-voltage control wiring at thermostat terminal connections, verifying proper wire terminations at C, G, and W1 terminals. System completely non-operational at time of arrival, requiring further diagnosis to determine root cause of recurring failure and excessive frost accumulation.
Mount Washington, KY 40047
Jordyn R.
Completed scheduled HVAC system maintenance and tune-up per campaign notification. Performed comprehensive diagnostic testing using clamp meter to verify system electrical performance, recording capacitance reading of 493 microfarads and operational amperage of 39.15 amps at the outdoor condensing unit. All measurements within acceptable parameters, confirming proper system operation and electrical integrity.
Mount Washington, KY 40047
Anthony L.
Completed comprehensive planned HVAC system maintenance and tune-up inspection. Evaluated system airflow by inspecting floor register vents and replaced air filters with new 16x20x4 and 16x20x1 pleated filters to ensure optimal air quality and system efficiency. Performed standard maintenance procedures on the evaporator coil assembly and associated ductwork components, confirming all mechanical systems are operating within normal parameters.
Mount Washington, KY 40047
Paul G.
# Tankless Water Heater Installation Successfully installed a GREEN tankless water heater system at a residential property. The installation included proper venting through the exterior brick wall using white PVC piping with appropriate elbow fittings to ensure code-compliant exhaust routing. All connections were secured, tested for proper operation, and the unit was commissioned to manufacturer specifications. The system is now providing on-demand hot water with improved energy efficiency compared to traditional tank-style water heaters.
Mount Washington, KY 40047
Anthony L.
Completed annual Platinum Level maintenance on single HVAC system approximately 8 months old. Performed comprehensive inspection of Lennox furnace unit, verified proper operation of all mechanical components, checked air circulation through floor registers, and ensured all PVC connections and piping were secure and functioning correctly.
Mount Washington, KY 40047
Paul G.
Conducted comprehensive site assessment for tankless water heater installation. Documented existing utility infrastructure in basement area, including current plumbing configuration, electrical routing through ceiling joists, and available mounting locations along concrete block foundation wall. Evaluated exterior gas meter location and connection points at building exterior to determine optimal routing for new gas line supply. Captured detailed measurements and photographic documentation of workspace constraints, existing utility cart positioning, overhead clearances, and wall-mounted infrastructure to develop accurate material takeoff and installation plan for tankless unit replacement.
Mount Washington, KY 40047
Vince B.
Provided comprehensive estimate for HVAC system conversion project involving disconnection of existing boiler system and integration of six heat pump units with current air conditioning infrastructure. Conducted detailed site assessment and measurements of existing Lennox equipment, including CBA25UH-036-230-01 model unit rated for 230/208V operation with R-410A refrigerant, documenting equipment specifications, electrical requirements, clearances, and system compatibility for heat pump installation across multiple zones.
Mount Washington, KY 40047
Jordyn R.
Responded to service call for 20-year-old air conditioning system blowing warm air in apartment unit. Performed comprehensive system evaluation of existing Goodman furnace and connected AC components located in basement utility closet. Upon inspection, determined that the aging system had reached end of serviceable life and recommended full HVAC replacement. Documented existing equipment configuration including ductwork, air handler, and furnace installation for replacement specifications. Provided customer with Red-level estimate for complete system replacement with A+ rated equipment to restore proper cooling function and improve energy efficiency.
Mount Washington, KY 40047
Jordyn R.
Responded to no cooling complaint on 20-year-old Goodman air conditioning system in apartment unit. Upon arrival, verified warm air discharge from supply registers with no visible ice formation on indoor coil. Inspected electrical panel and confirmed dedicated AC circuit breaker in proper operating position. Evaluated furnace/air handler unit and associated ductwork in basement utility closet. Documented equipment condition and system configuration with photos for service records. System age and lack of cooling capacity indicate likely compressor failure or refrigerant loss requiring further diagnostic testing or replacement consideration.
Mount Washington, KY 40047
Anthony L.
Responded to callback for HVAC system experiencing intermittent heating and cooling failure requiring breaker reset to restore operation. Upon arrival, evaluated Honeywell ProSeries thermostat displaying proper heat mode operation at 72°F setpoint and inspected outdoor condenser unit for potential electrical or mechanical issues. Documented system configuration and current operating conditions to diagnose underlying cause of power interruption and improper system performance reported by homeowner.
Mount Washington, KY 40047
Anthony L.
Responded to no cooling complaint on a 4-year-old residential air conditioning system blowing room temperature air with adequate airflow and no ice buildup present. Upon arrival, performed diagnostic evaluation of the outdoor condenser unit and system components. Identified the root cause of insufficient cooling, completed necessary repairs to restore proper refrigerant cycling and heat exchange function. System tested and verified operational, now providing adequate cooling to occupied space.
Mount Washington, KY 40047
Anthony L.
# HVAC Replacement Estimate Summary Conducted comprehensive on-site evaluation for complete HVAC system replacement at residential property. Homeowner requested estimate for aging but functional system as proactive replacement measure. Assessed existing dual outdoor condenser units positioned on concrete pads along exterior brick wall and indoor American Standard air handling equipment. Documented current equipment specifications, measured existing unit dimensions, evaluated ductwork connections including flexible gray corrugated runs, and photographed installation configurations. Provided detailed replacement options and system sizing recommendations based on current equipment layout and home comfort requirements. Estimated appointment duration completed within standard 1 to 1.5 hour timeframe.
Mount Washington, KY 40047
Vince B.
Conducted an estimate for replacement of an aging R22 system experiencing refrigerant leak. Visual inspection revealed two rooftop units with significant wear on the older beige unit, including visible rust on fan components and deteriorated condition compared to the newer gray unit. Recommended full system replacement due to R22 phase-out and current system's non-operational status.
Mount Washington, KY 40047
