Crestwood, KY HVAC & Electrical Services That Get the Job Done Right - A+ Derr Heating & Cooling
24/7 Emergency Service

HVAC emergencies happen when you least expect them. Contact the professionals at A+ Derr to take care of your issue. We have the necessary skills and tools to fix your system so you can safely use it once again. Call our team at 833-232-4328 to get emergency HVAC services in Louisville, KY, Evansville, IN, or the surrounding areas.

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Crestwood, KY HVAC & Electrical Services That Get the Job Done Right

AC condenser unit with fall leaves on and around it

It’s amazing how fast a small issue at home can turn into a major headache. Whether your air conditioner cuts out during a heatwave, your water heater delivers nothing but cold, or your lights keep flickering for no clear reason—it’s more than just a minor inconvenience. At A+ Derr Heating, Cooling & Electrical, we take the stress out of home repairs. Our licensed team shows up ready to diagnose the issue, walk you through your options, and get your HVAC or electrical system running the way it should. Fast, honest, and done right—that’s how we serve Crestwood. Call 833-232-4328 today or contact us online to get started. 

Crestwood Heating & Cooling Services That Keep You Comfortable Year-Round

Crestwood weather doesn’t always stick to the forecast—you can go from needing heat in the morning to cranking the AC by dinnertime. That’s why your HVAC system needs to be flexible, efficient, and reliable. Whether your furnace is making weird noises or your air conditioner just isn’t keeping up, we’re the team to call for fast, honest fixes and energy-saving upgrades.

  • Seasonal Maintenance & Tune-Ups: A little preventive care goes a long way. Our seasonal tune-ups help catch small issues early, improve energy efficiency, and keep your HVAC system running like it should all year long.
  • Furnace and AC Repairs: Strange noises? No airflow? If your system is struggling or completely out of commission, we’ll diagnose it fast and get things working again without the wait.
  • Heat Pumps & Ductless Mini-Splits: These flexible systems are perfect for keeping just the spaces you use the most comfortable—without needing to tear up walls or run new ducts.
  • New System Installations: If your old unit is racking up repair bills or just isn’t keeping up anymore, we’ll help you choose and install a new system that fits your home and your energy goals.
  • Geothermal Heating & Cooling: For the long-term thinker, geothermal is one of the most efficient ways to heat and cool your home. We design and install systems that tap into the stable temperatures underground for reliable, eco-friendly comfort.

Electrical Services in Crestwood, KY: Powering Comfort, Safety & Smart Upgrades

Whether you’re trying to modernize an older home, add outlets for your growing tech needs, or finally get rid of that one breaker that trips way too often, our electricians have you covered. We offer clean, safe, and reliable electrical upgrades tailored to how you actually live in your space—without cutting corners or keeping you in the dark about your options.

  • Breaker Panel Upgrades: If your lights flicker or your breakers trip constantly, it may be time for a panel upgrade. We install modern panels that meet your home’s demands.
  • Lighting and Outlet Installation: Need better kitchen lighting? Adding outlets to a finished basement? We handle all your home wiring needs.
  • EV Charger Installation: Driving an electric vehicle? We’ll install a Level 2 charger for fast, reliable home charging.
  • Whole-Home Surge Protection: Protect your electronics and appliances from damaging power surges with a whole-house surge protector.
  • Service Upgrades: Whether you’re renovating, adding new appliances, or just tired of flickering lights and overloaded breakers, we perform full-service upgrades that modernize your system and give you room to grow.
  • Equipment Repair: Outlets that don’t work, flickering fixtures, or electrical components that need troubleshooting—we fix common (and uncommon) issues to get your system running safely and reliably again.
  • Light Commercial Services: Running a small business in Crestwood? We provide dependable electrical services for offices, storefronts, and commercial spaces—keeping your operation powered, compliant, and efficient.
  • Backup Generator Installation: Be prepared for outages with a standby generator that powers your essential appliances automatically.

Indoor Air Quality Services in Crestwood, KY

Ductwork Cleaning

Even when your home is the perfect temperature, if the air feels heavy, dusty, or dries out your skin, it can take a toll on your comfort. A+ Derr’s Crestwood indoor air quality solutions tackle the invisible stuff—like allergens, humidity imbalances, and stale airflow—so your whole space feels healthier, cleaner, and easier to live in.

  • Humidity Control Systems: Ever wake up with dry skin or feel like your home’s turned into a sauna? Our humidifiers and dehumidifiers restore balance so the air feels just right, all year round.
  • Duct Cleaning & Sealing: If your vents puff out dust every time the system kicks on or some rooms never seem to feel comfortable, your ducts may be to blame. We clean and seal them for smoother airflow and better efficiency.
  • High-Efficiency Filter Upgrades: The right filter can make a big difference—especially if you’ve got pets, allergies, or just want cleaner air. We’ll help you find one that fits your system and your family’s needs.
  • Whole-Home Air Purifiers: From allergy season to everyday dust, our air purification systems clear out the stuff you don’t want to breathe in—leaving your home fresher and your lungs happier.

Schedule Your Home Service in Crestwood, KY

If something’s not working the way it should—whether it’s heating, cooling or power—we’re here to help. A+ Derr Heating, Cooling & Electrical is the team Crestwood homeowners count on for reliable service and long-lasting solutions. Give us a call today at 833-232-4328 to book your appointment and let’s get your home back to running right.

Recent Jobs and Reviews in Crestwood, KY

Job Locations and Reviews

Crestwood, KY - Responded to no cooling call on 3-year-old system experiencing short cycling behavior. Upon arrival, verified electrical panel breakers were intact and confirmed air filter had been recently replaced by homeowner. Performed diagnostic testing and measured system parameters, recording temperature differential of 52.5°F at evaporator coil. Identified intermittent system operation where unit would initiate startup sequence then immediately shut down. Diagnosed faulty pressure switch causing safety lockout during compressor startup cycle. Replaced defective pressure switch, tested system through multiple cooling cycles to verify proper operation, and confirmed stable runtime with appropriate temperature split across coil. System restored to normal cooling operation.
Jordyn R.
Jordyn R. Checked in
Responded to no cooling call on 3-year-old system experiencing short cycling behavior. Upon arrival, verified electrical panel breakers were intact and confirmed air filter had been recently replaced by homeowner. Performed diagnostic testing and measured system parameters, recording temperature differential of 52.5°F at evaporator coil. Identified intermittent system operation where unit would initiate startup sequence then immediately shut down. Diagnosed faulty pressure switch causing safety lockout during compressor startup cycle. Replaced defective pressure switch, tested system through multiple cooling cycles to verify proper operation, and confirmed stable runtime with appropriate temperature split across coil. System restored to normal cooling operation.
Crestwood, KY 40014
Completed platinum level preventive maintenance on 5-year-old HVAC system. Replaced 20x25x1 inch polarized air filter and performed comprehensive system inspection. Conducted electrical diagnostics using digital multimeter, verifying proper voltage and amperage readings across control board and system components. Inspected evaporator coil condition and confirmed adequate airflow through finned surfaces. Examined control board circuitry, toroidal inductors, relay components, and electrical connections for proper operation. All wiring connections secure with no signs of overheating or degradation. System operating within normal parameters with no deficiencies noted.
Completed platinum level preventive maintenance on 5-year-old HVAC system. Replaced 20x25x1 inch polarized air filter and performed comprehensive system inspection. Conducted electrical diagnostics using digital multimeter, verifying proper voltage and amperage readings across control board and system components. Inspected evaporator coil condition and confirmed adequate airflow through finned surfaces. Examined control board circuitry, toroidal inductors, relay components, and electrical connections for proper operation. All wiring connections secure with no signs of overheating or degradation. System operating within normal parameters with no deficiencies noted.
Jordyn R.
Jordyn R. Checked in
Completed platinum level preventive maintenance on 5-year-old HVAC system. Replaced 20x25x1 inch polarized air filter and performed comprehensive system inspection. Conducted electrical diagnostics using digital multimeter, verifying proper voltage and amperage readings across control board and system components. Inspected evaporator coil condition and confirmed adequate airflow through finned surfaces. Examined control board circuitry, toroidal inductors, relay components, and electrical connections for proper operation. All wiring connections secure with no signs of overheating or degradation. System operating within normal parameters with no deficiencies noted.
Crestwood, KY 40014
Responded to no-cooling call on 2-year-old residential system with indoor temperature at 82°F and thermostat set to 72°F. Found outdoor condensing unit completely inoperative with no power to compressor or condenser fan. Performed diagnostic testing on electrical components, checked capacitor values, tested contactor operation, and verified proper voltage at disconnect. Inspected condenser coil condition and cleared vegetation growth around unit perimeter to ensure adequate airflow clearance. Restored system to full operational status with outdoor unit running properly and cooling cycle engaged.
Responded to no-cooling call on 2-year-old residential system with indoor temperature at 82°F and thermostat set to 72°F. Found outdoor condensing unit completely inoperative with no power to compressor or condenser fan. Performed diagnostic testing on electrical components, checked capacitor values, tested contactor operation, and verified proper voltage at disconnect. Inspected condenser coil condition and cleared vegetation growth around unit perimeter to ensure adequate airflow clearance. Restored system to full operational status with outdoor unit running properly and cooling cycle engaged.
Neal H.
Neal H. Checked in
Responded to no-cooling call on 2-year-old residential system with indoor temperature at 82°F and thermostat set to 72°F. Found outdoor condensing unit completely inoperative with no power to compressor or condenser fan. Performed diagnostic testing on electrical components, checked capacitor values, tested contactor operation, and verified proper voltage at disconnect. Inspected condenser coil condition and cleared vegetation growth around unit perimeter to ensure adequate airflow clearance. Restored system to full operational status with outdoor unit running properly and cooling cycle engaged.
Crestwood, KY 40014
Responded to callback for HVAC system failure following previous service visit. Upon arrival, found outdoor condenser unit and indoor thermostat both operational at time of inspection. Thermostat display showing 65°F setpoint in heating mode with normal functionality. Condenser unit positioned against exterior lattice fence, sitting on concrete pad with protective top grille intact. System appeared to be cycling properly during diagnostic check. Documented equipment condition through photographs for service records. Customer reported system worked approximately one day after initial service call before experiencing repeated failure. Will require continued monitoring to identify intermittent issue causing system shutdown between service visits.
Responded to callback for HVAC system failure following previous service visit. Upon arrival, found outdoor condenser unit and indoor thermostat both operational at time of inspection. Thermostat display showing 65°F setpoint in heating mode with normal functionality. Condenser unit positioned against exterior lattice fence, sitting on concrete pad with protective top grille intact. System appeared to be cycling properly during diagnostic check. Documented equipment condition through photographs for service records. Customer reported system worked approximately one day after initial service call before experiencing repeated failure. Will require continued monitoring to identify intermittent issue causing system shutdown between service visits.
Anthony L.
Anthony L. Checked in
Responded to callback for HVAC system failure following previous service visit. Upon arrival, found outdoor condenser unit and indoor thermostat both operational at time of inspection. Thermostat display showing 65°F setpoint in heating mode with normal functionality. Condenser unit positioned against exterior lattice fence, sitting on concrete pad with protective top grille intact. System appeared to be cycling properly during diagnostic check. Documented equipment condition through photographs for service records. Customer reported system worked approximately one day after initial service call before experiencing repeated failure. Will require continued monitoring to identify intermittent issue causing system shutdown between service visits.
Crestwood, KY 40014
Completed full HVAC system installation featuring a 3-ton 17 SEER air conditioning unit paired with an 80% AFUE gas furnace. Installed new air handler with 16x25x4 media filter cabinet, verified proper airflow and temperature differential across system components reading 68.2°F ambient conditions. Financing arranged with down payment applied, customer protected work area with drop cloths during installation process.
Completed full HVAC system installation featuring a 3-ton 17 SEER air conditioning unit paired with an 80% AFUE gas furnace. Installed new air handler with 16x25x4 media filter cabinet, verified proper airflow and temperature differential across system components reading 68.2°F ambient conditions. Financing arranged with down payment applied, customer protected work area with drop cloths during installation process.
Tanner E.
Tanner E. Checked in
Completed full HVAC system installation featuring a 3-ton 17 SEER air conditioning unit paired with an 80% AFUE gas furnace. Installed new air handler with 16x25x4 media filter cabinet, verified proper airflow and temperature differential across system components reading 68.2°F ambient conditions. Financing arranged with down payment applied, customer protected work area with drop cloths during installation process.
Crestwood, KY 40014
Completed Bronze membership water heater flush service on Rheem Classic Professional tanked unit. Drained sediment from tank bottom, verified proper operation of temperature and pressure relief valve with yellow tag, inspected all copper supply line connections and brass fittings for leaks, and confirmed unit returned to normal operation with no issues observed.
Completed Bronze membership water heater flush service on Rheem Classic Professional tanked unit. Drained sediment from tank bottom, verified proper operation of temperature and pressure relief valve with yellow tag, inspected all copper supply line connections and brass fittings for leaks, and confirmed unit returned to normal operation with no issues observed.
Paul G.
Paul G. Checked in
Completed Bronze membership water heater flush service on Rheem Classic Professional tanked unit. Drained sediment from tank bottom, verified proper operation of temperature and pressure relief valve with yellow tag, inspected all copper supply line connections and brass fittings for leaks, and confirmed unit returned to normal operation with no issues observed.
Crestwood, KY 40014
Conducted comprehensive replacement estimate for 27-year-old original HVAC system with uncertain operational status. Evaluated existing outdoor condenser unit positioned on concrete pad near residential structure, assessed electrical disconnect and meter configuration, and documented gas meter assembly for system compatibility requirements. Provided homeowner with complete replacement options and specifications for aging equipment approaching end of service life.
Conducted comprehensive replacement estimate for 27-year-old original HVAC system with uncertain operational status. Evaluated existing outdoor condenser unit positioned on concrete pad near residential structure, assessed electrical disconnect and meter configuration, and documented gas meter assembly for system compatibility requirements. Provided homeowner with complete replacement options and specifications for aging equipment approaching end of service life.
Brad C.
Brad C. Checked in
Conducted comprehensive replacement estimate for 27-year-old original HVAC system with uncertain operational status. Evaluated existing outdoor condenser unit positioned on concrete pad near residential structure, assessed electrical disconnect and meter configuration, and documented gas meter assembly for system compatibility requirements. Provided homeowner with complete replacement options and specifications for aging equipment approaching end of service life.
Crestwood, KY 40014
Crestwood, KY - Responded to no-cool condition on 6-year-old residential air conditioning system. Upon arrival, confirmed unit was humming but compressor would not start. Performed diagnostic evaluation of outdoor condenser unit and identified failed dual run capacitor as root cause. Removed access panel, disconnected power, and safely discharged and replaced defective capacitor with proper OEM-rated replacement. Verified all electrical connections, restored power, and tested system operation. Compressor and condenser fan motor started successfully, unit cooling properly with normal amp draw and operating pressures within manufacturer specifications.
Anthony L.
Anthony L. Checked in
Responded to no-cool condition on 6-year-old residential air conditioning system. Upon arrival, confirmed unit was humming but compressor would not start. Performed diagnostic evaluation of outdoor condenser unit and identified failed dual run capacitor as root cause. Removed access panel, disconnected power, and safely discharged and replaced defective capacitor with proper OEM-rated replacement. Verified all electrical connections, restored power, and tested system operation. Compressor and condenser fan motor started successfully, unit cooling properly with normal amp draw and operating pressures within manufacturer specifications.
Crestwood, KY 40014
Completed Platinum Level planned maintenance on single HVAC system including filter replacement with 20x25x5 media filter as part of second visit on two-year service agreement. Performed comprehensive system diagnostics using digital temperature measurement equipment to verify proper operation of ductwork and air handling components, with all readings confirming system is functioning within normal parameters.
Completed Platinum Level planned maintenance on single HVAC system including filter replacement with 20x25x5 media filter as part of second visit on two-year service agreement. Performed comprehensive system diagnostics using digital temperature measurement equipment to verify proper operation of ductwork and air handling components, with all readings confirming system is functioning within normal parameters.
Kenny H.
Kenny H. Checked in
Completed Platinum Level planned maintenance on single HVAC system including filter replacement with 20x25x5 media filter as part of second visit on two-year service agreement. Performed comprehensive system diagnostics using digital temperature measurement equipment to verify proper operation of ductwork and air handling components, with all readings confirming system is functioning within normal parameters.
Crestwood, KY 40014
Responded to service call for outdoor unit making unusual noise on 3-year-old system. Upon arrival, performed complete system diagnostic and inspection of outdoor condensing unit to identify source of noise concern. Inspected condenser fan motor, compressor mounting, and all mechanical components for abnormal operation or wear. System was operational with adequate airflow through indoor vents and no ice buildup present at air handler. Checked refrigerant pressures, electrical connections, and contactor operation. Inspected indoor air handler and noted 20x25x5 pleated media filter showing moderate dust accumulation. Verified Lennox thermostat programming and operation, confirming system cycling properly between heating and cooling modes with setpoints at 60°F heat and 68°F cool. Documented filter condition with service date notation for future maintenance tracking. Completed full system evaluation and provided recommendations for continued operation.
Responded to service call for outdoor unit making unusual noise on 3-year-old system. Upon arrival, performed complete system diagnostic and inspection of outdoor condensing unit to identify source of noise concern. Inspected condenser fan motor, compressor mounting, and all mechanical components for abnormal operation or wear. System was operational with adequate airflow through indoor vents and no ice buildup present at air handler. Checked refrigerant pressures, electrical connections, and contactor operation. Inspected indoor air handler and noted 20x25x5 pleated media filter showing moderate dust accumulation. Verified Lennox thermostat programming and operation, confirming system cycling properly between heating and cooling modes with setpoints at 60°F heat and 68°F cool. Documented filter condition with service date notation for future maintenance tracking. Completed full system evaluation and provided recommendations for continued operation.
Kenny H.
Kenny H. Checked in
Responded to service call for outdoor unit making unusual noise on 3-year-old system. Upon arrival, performed complete system diagnostic and inspection of outdoor condensing unit to identify source of noise concern. Inspected condenser fan motor, compressor mounting, and all mechanical components for abnormal operation or wear. System was operational with adequate airflow through indoor vents and no ice buildup present at air handler. Checked refrigerant pressures, electrical connections, and contactor operation. Inspected indoor air handler and noted 20x25x5 pleated media filter showing moderate dust accumulation. Verified Lennox thermostat programming and operation, confirming system cycling properly between heating and cooling modes with setpoints at 60°F heat and 68°F cool. Documented filter condition with service date notation for future maintenance tracking. Completed full system evaluation and provided recommendations for continued operation.
Crestwood, KY 40014
Crestwood, KY - Responded to no cooling complaint on 6-year-old residential HVAC system with thermostat set to 68°F but reading 73°F. Upon inspection, discovered heavily restricted airflow due to significant dust and debris accumulation in return air grilles and filter media. Cleaned ventilation registers and replaced clogged air filter, restoring proper airflow to the system. System returned to normal cooling operation with adequate air distribution throughout the home.
Jordyn R.
Jordyn R. Checked in
Responded to no cooling complaint on 6-year-old residential HVAC system with thermostat set to 68°F but reading 73°F. Upon inspection, discovered heavily restricted airflow due to significant dust and debris accumulation in return air grilles and filter media. Cleaned ventilation registers and replaced clogged air filter, restoring proper airflow to the system. System returned to normal cooling operation with adequate air distribution throughout the home.
Crestwood, KY 40014
Completed Gold Level planned duo maintenance on two 5-year-old HVAC systems, including comprehensive inspection of both indoor and outdoor units, filter replacement with 20x25x5 media filters, and system performance verification. Inspected crawl space and root cellar areas to assess ductwork condition, identifying areas requiring resealing and repair of broken ducts for future service. Both systems operating within normal parameters; documented equipment condition with photos showing outdoor condenser unit and basement mechanical components including condensate drainage and ventilation piping.
Completed Gold Level planned duo maintenance on two 5-year-old HVAC systems, including comprehensive inspection of both indoor and outdoor units, filter replacement with 20x25x5 media filters, and system performance verification. Inspected crawl space and root cellar areas to assess ductwork condition, identifying areas requiring resealing and repair of broken ducts for future service. Both systems operating within normal parameters; documented equipment condition with photos showing outdoor condenser unit and basement mechanical components including condensate drainage and ventilation piping.
Anthony L.
Anthony L. Checked in
Completed Gold Level planned duo maintenance on two 5-year-old HVAC systems, including comprehensive inspection of both indoor and outdoor units, filter replacement with 20x25x5 media filters, and system performance verification. Inspected crawl space and root cellar areas to assess ductwork condition, identifying areas requiring resealing and repair of broken ducts for future service. Both systems operating within normal parameters; documented equipment condition with photos showing outdoor condenser unit and basement mechanical components including condensate drainage and ventilation piping.
Crestwood, KY 40014
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Previous contractor diagnosed failed compressor. Upon arrival, measured supply air temperature at register showing 53.1°F, indicating system is producing cooled air. Inspected outdoor condensing unit and verified compressor operation, refrigerant lines, and overall system functionality. System found operating within normal parameters with no evidence of compressor failure at time of inspection.
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Previous contractor diagnosed failed compressor. Upon arrival, measured supply air temperature at register showing 53.1°F, indicating system is producing cooled air. Inspected outdoor condensing unit and verified compressor operation, refrigerant lines, and overall system functionality. System found operating within normal parameters with no evidence of compressor failure at time of inspection.
Jordyn R.
Jordyn R. Checked in
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Previous contractor diagnosed failed compressor. Upon arrival, measured supply air temperature at register showing 53.1°F, indicating system is producing cooled air. Inspected outdoor condensing unit and verified compressor operation, refrigerant lines, and overall system functionality. System found operating within normal parameters with no evidence of compressor failure at time of inspection.
Crestwood, KY 40014
Crestwood, KY - Responded to follow-up service call for outdoor condensing unit producing loud rattling noise during operation following recent motor replacement. Upon arrival, performed thorough inspection of the unit and surrounding components to identify source of abnormal sound. Conducted operational test of the system, verified proper motor function, and checked all mechanical fasteners, fan blade assembly, and cabinet panels for loose hardware or debris that could cause rattling during runtime.
Anthony L.
Anthony L. Checked in
Responded to follow-up service call for outdoor condensing unit producing loud rattling noise during operation following recent motor replacement. Upon arrival, performed thorough inspection of the unit and surrounding components to identify source of abnormal sound. Conducted operational test of the system, verified proper motor function, and checked all mechanical fasteners, fan blade assembly, and cabinet panels for loose hardware or debris that could cause rattling during runtime.
Crestwood, KY 40014
Performed on-site evaluation of existing 15-year-old Trane air conditioning condenser unit and matching furnace system for complete HVAC replacement estimate. Inspected outdoor condenser unit located on brick paver pad against exterior wall, assessed electrical disconnect and utility connections, and documented current system configuration. Evaluated indoor air handler and furnace installation in basement utility area, reviewed existing ductwork connections, and photographed equipment specifications for accurate replacement system sizing and proposal development.
Performed on-site evaluation of existing 15-year-old Trane air conditioning condenser unit and matching furnace system for complete HVAC replacement estimate. Inspected outdoor condenser unit located on brick paver pad against exterior wall, assessed electrical disconnect and utility connections, and documented current system configuration. Evaluated indoor air handler and furnace installation in basement utility area, reviewed existing ductwork connections, and photographed equipment specifications for accurate replacement system sizing and proposal development.
Brad C.
Brad C. Checked in
Performed on-site evaluation of existing 15-year-old Trane air conditioning condenser unit and matching furnace system for complete HVAC replacement estimate. Inspected outdoor condenser unit located on brick paver pad against exterior wall, assessed electrical disconnect and utility connections, and documented current system configuration. Evaluated indoor air handler and furnace installation in basement utility area, reviewed existing ductwork connections, and photographed equipment specifications for accurate replacement system sizing and proposal development.
Crestwood, KY 40014
Diagnosed and repaired communication issue on nearly new heat pump system that was preventing heating and cooling operation. Inspection of circuit board revealed loose wire connections at the main control board, which were properly secured and tested. System now communicating properly with all components and functioning at optimal performance.
Diagnosed and repaired communication issue on nearly new heat pump system that was preventing heating and cooling operation. Inspection of circuit board revealed loose wire connections at the main control board, which were properly secured and tested. System now communicating properly with all components and functioning at optimal performance.
Anthony L.
Anthony L. Checked in
Diagnosed and repaired communication issue on nearly new heat pump system that was preventing heating and cooling operation. Inspection of circuit board revealed loose wire connections at the main control board, which were properly secured and tested. System now communicating properly with all components and functioning at optimal performance.
Crestwood, KY 40014
Performed routine AC tune-up on system of undetermined age. Inspected Honeywell digital thermostat for proper operation with temperature reading at 69°F. Examined air filter which showed normal usage patterns with slight discoloration but remains functional; filter has proper pleating with no significant airflow restrictions.
Performed routine AC tune-up on system of undetermined age. Inspected Honeywell digital thermostat for proper operation with temperature reading at 69°F. Examined air filter which showed normal usage patterns with slight discoloration but remains functional; filter has proper pleating with no significant airflow restrictions.
Victor W.
Victor W. Checked in
Performed routine AC tune-up on system of undetermined age. Inspected Honeywell digital thermostat for proper operation with temperature reading at 69°F. Examined air filter which showed normal usage patterns with slight discoloration but remains functional; filter has proper pleating with no significant airflow restrictions.
Crestwood, KY 40014
Completed planned maintenance service on HVAC system according to Platinum Level specifications. Temperature readings were taken at multiple vents, with measurements of 64.9°F and 55.6°F recorded at decorative floor registers. All required maintenance tasks were performed according to scheduled service agreement.
Completed planned maintenance service on HVAC system according to Platinum Level specifications. Temperature readings were taken at multiple vents, with measurements of 64.9°F and 55.6°F recorded at decorative floor registers. All required maintenance tasks were performed according to scheduled service agreement.
Jordyn R.
Jordyn R. Checked in
Completed planned maintenance service on HVAC system according to Platinum Level specifications. Temperature readings were taken at multiple vents, with measurements of 64.9°F and 55.6°F recorded at decorative floor registers. All required maintenance tasks were performed according to scheduled service agreement.
Crestwood, KY 40014
Crestwood, KY - Performed diagnostic testing on 7-month-old system that was not maintaining desired temperature (68°F actual vs. 73°F setpoint). Conducted electrical measurements with Fieldpiece SC260 clamp meter, confirming proper amperage readings of 20.53. System has adequate airflow but requires adjustment to improve heating capacity and performance.
Jordyn R.
Jordyn R. Checked in
Performed diagnostic testing on 7-month-old system that was not maintaining desired temperature (68°F actual vs. 73°F setpoint). Conducted electrical measurements with Fieldpiece SC260 clamp meter, confirming proper amperage readings of 20.53. System has adequate airflow but requires adjustment to improve heating capacity and performance.
Crestwood, KY 40014
Completed platinum-level maintenance service on 4-year-old HVAC system. Replaced 16x25x1 air filters with new Filtrete filters as part of scheduled second maintenance visit. Performed electrical diagnostic testing on unit with multimeters to verify proper system operation and ensure all components are functioning within manufacturer specifications.
Completed platinum-level maintenance service on 4-year-old HVAC system. Replaced 16x25x1 air filters with new Filtrete filters as part of scheduled second maintenance visit. Performed electrical diagnostic testing on unit with multimeters to verify proper system operation and ensure all components are functioning within manufacturer specifications.
Victor W.
Victor W. Checked in
Completed platinum-level maintenance service on 4-year-old HVAC system. Replaced 16x25x1 air filters with new Filtrete filters as part of scheduled second maintenance visit. Performed electrical diagnostic testing on unit with multimeters to verify proper system operation and ensure all components are functioning within manufacturer specifications.
Crestwood, KY 40014
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.