Reliable HVAC Service in Evansville Since 1975
When you need HVAC services in the Evansville area, you need A+ Derr. As a fourth-generation, family-operated business, we’ve been helping Evansville families stay comfortable in their homes since 1975. Our commitment to excellence means we’re there for you, no matter when you need us. We have 24/7 emergency and same-day service, so you know your HVAC systems will be running properly in no time. We also offer free estimates on service calls and replacement services. You’ll know you have the best price with expert and professional technicians. We love our customers, and we want you to know that your satisfaction is our priority. That’s why we offer a 100% satisfaction guarantee: “If you’re not happy with a product installed by us after the first year, we’ll buy it back.” For HVAC services you can trust in Evansville, call A+ Derr at 833-232-4328!Located at: 7545 Peachwood Dr. Newburgh, IN, 47630 When you live in the Evansville area, you can count on cold winters. That means you also need to be able to count on your heating system to keep your home warm and comfortable all winter long. If your heating system is not reliable anymore, contact A+ Derr. Our expert technicians will make sure your heating system is fixed quickly and efficiently. Our services include:
Don’t wait until the cold weather seasons to have your heating system checked. Contact us at 833-232-4328 to know your system will be ready when you need it most.
Air Conditioning Systems in Evansville, IN
You don’t want to be stuck in the middle of a humid summer without a working air conditioning system. But if that happens, it’s time to call the experts at A+ Derr. We can help with any of your cooling issues.
No matter what your cooling system needs are, we can help. We offer:
Our team is ready and able to help you feel cool and comfortable all summer long! Call 833-232-4328 or contact us online to schedule service.
Indoor Air Quality for Evansville
Have you ever thought about the quality of the air inside your home? It can be unpleasant to think about, but your home’s air can be filled with germs and bacteria. When you control the indoor air quality of your home, you can reduce germs and dust naturally. Plus, eliminating or reducing the number of particles in the air helps your HVAC systems run more efficiently. Because our homes have fewer leaks, it is easier to heat and cool them. But that also means germs, bacteria, and dust can linger in our homes, making us sick or causing our house to smell. Make sure your indoor air quality is good to help reduce asthma, allergies, and other conditions. Call 833-232-4328 or contact us online to learn more about how A+ Derr can improve your air quality!
Signs You Need HVAC Repair
With an investment like an HVAC system, you want to make sure it is working efficiently and effectively. But it can be difficult to tell when you should have your system repaired. Here are some signs to look for:
- Your system is not blowing the correct temperature air.
- Your thermostat is not working.
- Your system is making strange noises.
- You notice smells coming from your system.
If you think you may need your HVAC system to be repaired, our team of expert and professional technicians is ready to help you. We’re even available 24/7 for those issues that just can’t wait! If your heater or air conditioner needs repairs, you can count on A+ Derr! Call 833-232-4328 or contact us online.
How Long Should Your HVAC System Last?
With regular maintenance and proper care, your HVAC system should last at least 15 years. After that, the system will become increasingly inefficient, and it may be time to have it replaced. If you think you may need an HVAC system replacement, call the experts at A+ Derr. We offer free estimates for heating and air conditioning system replacements!
Benefits of Replacing Your HVAC System
No matter how well you maintain your HVAC system, at some point, it is going to be in your best interest to replace it. Having a professional inspect your system is the best way to know if it’s time to replace your HVAC. But before you have a technician come to your home, here are some telltale signs that a replacement is needed:
- Your system is more than 15 years old.
- Some rooms in your home are too hot or cold.
- Your heating system is noisy.
- It needs to be repaired more than once a year.
Choose A+ Derr for Your Evansville, IN HVAC Needs
A+ Derr is committed to exceptional customer service. We have been in business since 1975, and we understand what it takes to make sure your home is comfortable all year long. Our 100% Satisfaction Guarantee means you know you’ll be satisfied with your new system. For A+ HVAC services, choose A+ Derr! Contact us online or call 833-232-4328 to schedule service for your Evansville home.
Evansville HVAC FAQs
How does Ohio River humidity affect cooling in Evansville?
High moisture loads make short cooling cycles feel clammy. Longer, lower-speed operation and clean coils remove more moisture, which helps rooms feel cooler at the same setpoint.
What should I do before a same-day service visit?
Open all supply and return grilles, clear access to the air handler, thermostat, panel, and outdoor unit, and note when symptoms happen. If a coil is iced, set cooling Off and fan On until a technician arrives.
Which thermostat features actually help in our climate?
Look for dehumidify on cool, adaptive recovery, and staging control. These features favor steady operation that manages humidity and reduces swings.
Do I need permits when replacing HVAC equipment around Vanderburgh County?
Most equipment replacements require permitting and inspections for electrical and mechanical work. A+ Derr Heating & Cooling handles the paperwork and coordinates inspections.
What SEER2 rating is a good fit for Evansville summers?
Mid to high SEER2 systems paired with sealed ducts, verified airflow, and smart controls typically provide a strong balance of comfort and cost.
Why do some rooms stay warm even after a repair?
Duct balance and return paths may need attention. Adding returns to closed bedrooms, correcting undersized runs, and setting the right blower speed often evens out temperatures.
Are heat pumps practical here or should I stick with a furnace and AC?
Heat pumps work well for cooling and shoulder-season heating. Many homes stay with a dual-fuel setup that uses the heat pump most days and the furnace during colder snaps.
What maintenance tasks make the biggest difference before peak heat?
Replace filters on time, keep the outdoor coil clear of cottonwood and grass clippings, and make sure the condensate drain is flowing. A spring tune-up catches issues before a heat wave.
How can I reduce HVAC noise that carries through walls or patios?
Level the outdoor unit, maintain clearances, add vibration pads, and check that indoor returns are sized correctly. Flexible connectors and proper duct supports also help.
What should I check if the system will not start after a storm?
Give the thermostat and controls a few minutes for built-in delays, then check breakers and the outdoor disconnect. If a breaker trips again or the fan hums without spinning, power the system off and schedule service.
Recent Jobs and Reviews in Evansville, IN
Job Locations and Reviews
Responded to no cooling call on 20+ year old system located on northwest corner of building. Upon arrival, found tripped breaker and unit completely non-operational with no airflow. Outdoor condenser exhibited severe debris accumulation on aluminum fins, including heavy buildup of cottonwood seeds, pollen, dust, and organic material restricting airflow. Performed diagnostic evaluation of electrical system and inspected condensate drain line. Assessed overall unit condition and determined extent of cleaning required to restore proper operation.
Completed scheduled AC tune-up and preventive maintenance on residential air conditioning system. Performed comprehensive inspection of outdoor condenser unit and indoor air handler, checked refrigerant levels, cleaned components, verified electrical connections, and tested system operation to ensure optimal performance for the cooling season. All equipment is functioning within normal parameters.
Completed follow-up electrical site visit to address gas pipe regulator installation. Installed regulator on gas line as previously coordinated, with required part having been staged for the appointment. Documented existing infrastructure in crawl space area, including gas piping configuration along structural brick wall and HVAC system location beneath exterior deck structure. Work completed and photographed for service records.
Responded to scheduled water heater flush appointment and performed visual inspection of the unit upon arrival. After assessment and consultation, the service visit was dismissed as the water heater flush was determined to be unnecessary at this time. Documented current condition of the water heater with photographs showing proper installation, intact safety labels, and functioning plumbing connections including copper supply lines and gas connections.
Conducted comprehensive HVAC replacement estimate for property with three separate heating and cooling systems, all currently non-operational. Performed detailed assessment of each unit to provide individual replacement quotes as well as a complete three-system package option. Documented existing equipment specifications, evaluated home comfort requirements, and photographed current thermostat configuration to develop tailored replacement solutions for each zone.
Completed installation of 2.5-ton, 15.5 SEER air conditioning system with 97% AFUE upflow gas furnace and chimney liner. System was properly charged, tested, and verified operational with refrigerant pressures reading 129.2 PSI low side and 283.7 PSI high side, supply air temperature at 60.9°F, and all performance parameters within manufacturer specifications.
Responded to no cooling condition on rooftop air conditioning unit approximately 15 years old. Upon inspection, identified failed contactor preventing compressor operation. Unit over receptionist desk had been shut off due to noise prior to arrival. Documented electrical connections and contactor assembly with photographs showing component degradation. System requires contactor replacement to restore cooling function. Estimated 90 minutes for repair completion with return visit scheduled to install new contactor and restore full system operation.
Completed installation of two toilets in residential bathrooms. Provided customer with Bio-Clean bacterial drain and septic treatment product as requested, which offers environmentally safe waste elimination for drains and septic systems.
Completed comprehensive annual maintenance service on three-system HVAC installation for Gold Level home membership. Performed thorough inspection and preventive maintenance on outdoor Lennox condenser unit and indoor furnace system, including filter replacement, system performance verification, and safety checks. All equipment found operating within normal parameters with no immediate service needs identified.
Completed annual platinum-level preventive maintenance on single-system residential HVAC unit with 20x25x5 filter configuration. Performed comprehensive inspection of control board, verified proper operation of all relays and electronic components, checked terminal connections and wiring integrity at control interface. All systems tested and operating within normal parameters.
Completed annual Platinum Level maintenance on single-system residential HVAC unit with 16x20 Honeywell Tophat filter. Performed comprehensive system inspection including temperature verification at ductwork (72°F recorded), examined control board and electrical connections, and documented system condition through photographic records. All components operating within normal parameters with no deficiencies noted during first annual maintenance visit.
Completed second annual maintenance visit on 8-year-old residential HVAC system with 16x25x5 filter specification. Inspected indoor furnace and air handler unit in basement along with outdoor Amana condensing unit, verified proper operation of all components, and documented system condition with photographs per planned maintenance protocol.
Completed first-visit Platinum Level maintenance on a single-zone residential HVAC system consisting of a Lennox furnace and outdoor condensing unit. Performed comprehensive inspection of both indoor and outdoor components, checked all mechanical and electrical connections, verified proper airflow through ductwork, and documented system condition with photographs for service records.
Conducted follow-up site visit to investigate suspected refrigerant leak at condenser coil bottom loop. Performed visual inspection of air handler unit and documented internal components with photographic evidence showing HVAC system interior, insulation condition, and equipment housing for further diagnostic evaluation.
Conducted comprehensive replacement estimate for 22-year-old non-functional HVAC system at residential property. Evaluated existing outdoor unit condition, electrical disconnect configuration, and installation site accessibility including gravel pad area and weathered equipment mounting location. Documented current system setup and site conditions to provide homeowner with complete replacement options, as repair was not desired given equipment age and operational status.
Responded to service call for system with no airflow. Diagnosed failed reversing valve solenoid (24V) on outdoor heat pump unit. Opened electrical disconnect box and tested control voltage circuits to confirm solenoid malfunction preventing system operation. Unit remains non-operational pending replacement part installation. Documented wiring configuration and component specifications with photos to expedite part ordering. Estimated repair time of 60 minutes once replacement solenoid arrives.
# HVAC Maintenance Summary Completed annual platinum-level preventative maintenance on a single residential HVAC system with a 16x25 filter size. System age indicates recent installation with expected service date of 3/27/26. # Work Performed Performed comprehensive system inspection and diagnostic testing using calibrated manometer equipment. Measured gas pressure at 4.85" water column to verify proper combustion and system operation within manufacturer specifications. Inspected all electrical connections, control board components, and wiring harnesses for signs of wear, damage, or loose connections. Verified proper function of terminal blocks and ensured all wire bundles were properly secured with cable management ties. Examined furnace interior components including heat exchanger access area, gas valve assembly, and associated piping connections. Checked all tubing connections for leaks and proper seating. Inspected pressure switch operation and tested safety controls for proper
# HVAC Maintenance Summary Completed second annual Gold Level planned maintenance visit on 8-year-old residential HVAC system with single zone configuration utilizing 20x20x4 filtration. # Work Performed ## Indoor Equipment Inspection Performed comprehensive inspection and maintenance of furnace unit located in utility room. Conducted visual examination of heat exchanger for cracks or deterioration. Verified proper operation of burner assembly and ignition system. Inspected and tested safety controls including limit switches and flame sensors. Checked blower motor operation, amp draw, and lubricated bearings as needed. Examined flexible metallic ductwork connections and insulation integrity. Verified proper condensate drain operation through PVC drainage system. Tested furnace cycling and confirmed proper temperature rise across heat exchanger. ## Air Filtration Replaced 20x20x4 media filter to maintain optimal airflow and indoor air quality. Inspected filter housing for proper s
Completed scheduled HVAC maintenance on three outdoor air conditioning condenser units positioned along the residential building exterior. Performed comprehensive tune-up service including inspection of all three units, cleaning of condenser coils, verification of refrigerant levels, electrical component testing, and operational checks to ensure proper system performance for the 2026 cooling season.
Responded to no cooling complaint on residential air conditioning system less than 10 years old. Upon arrival, performed visual inspection of outdoor condensing unit and indoor thermostat controls. Verified thermostat settings and operation of Honeywell Home digital control unit. Inspected outdoor condenser unit including electrical disconnect, conduit connections, and overall equipment condition. Unit mounted on exterior platform with proper clearances maintained. Conducted diagnostic assessment to identify cause of cooling failure and recommended appropriate corrective action to restore system operation.
