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
Successfully diagnosed and repaired non-operational sump/waste pump located in utility enclosure of 85-year-old residence. Identified electrical connection issue, restored pump functionality and verified proper operation before completing service.
Completed scheduled Platinum Level maintenance service on one HVAC system. Inspected and verified proper operation of Honeywell Home digital thermostat (currently reading 67°F) installed on wooden wall. Replaced 20x20x5 filter as part of annual maintenance plan (first visit of the year).
Successfully performed scheduled maintenance on Lochinvar tanked water heater, including a comprehensive system flush to remove sediment buildup and improve efficiency. Inspected all connections, verified proper venting, and confirmed system operation after service was completed.
Responded to follow-up service call for non-operational furnace after previous day's maintenance. Diagnosed issue with Goodman GSX160361 system where thermostat was calling for heat but no airflow was present. Restored proper operation by repairing broken wire connection at control board and verified complete heating cycle functionality before departure.
Conducted comprehensive evaluation of HVAC system for replacement estimate, focusing on AC unit with known refrigerant leaks while furnace remains operational. Documentation included detailed measurements of downflow system configuration showing furnace, coil, and base dimensions, with particular attention to ceiling clearances and base condition for proper replacement specifications.
Performed scheduled Platinum Level maintenance on a 36-year-old HVAC system, replacing the 20x25x5 filter. During inspection, documented significant structural damage to the ductwork, including a 2-3 inch vertical crack in a galvanized steel pipe with signs of corrosion around the edges. Photographic evidence was collected of the damaged connection points for future reference.
Successfully installed complete GREEN 4T 17S 97UP system, including new indoor furnace unit with properly connected ductwork and PVC venting in attic space, along with dual outdoor condenser units mounted on concrete pad with appropriate electrical connections and refrigerant lines. All components were properly secured, tested for optimal performance, and photo documentation was taken of the completed installation.
Completed annual platinum maintenance on 3-year-old HVAC system. Investigated customer-reported intermittent rumbling noise in ductwork during system operation. Inspected internal components, wiring connections, and mounting hardware. Replaced 16x25x5 filter as part of scheduled maintenance. System functioning properly; recommended continued annual service.
Completed Platinum Level maintenance on 7-year-old HVAC system including replacement of 20x25x2 filters and inspection of polarized media. Performed electrical diagnostics with multimeter, measuring microamp current draw (2.1 μA) to verify proper system operation. All components functioning correctly during this first annual maintenance visit.
Completed installation of new ductwork in renovation area, including proper insulation of silver ducts running between exposed ceiling joists. System connects to existing A.O. Smith ProLine Commercial Grade water heater with appropriate ventilation piping secured with metal tape at joints.
Completed second annual maintenance visit on 12-year-old HVAC system under Platinum Level service agreement. Replaced 16x25x4 air filter as part of scheduled maintenance protocol. System functioning properly; customer due for service renewal.
Installed a new 2.5-ton Lennox 14 SEER complete HVAC system with an 81% efficiency furnace. The outdoor condenser unit was properly positioned on the ground adjacent to the residence with PVC lines connected to the structure. System was tested for proper operation and photo documentation was taken of the completed installation.
Completed site assessment for gas tankless water heater conversion from existing 40-gallon gas tank unit. Evaluated current HVAC setup, including ventilation requirements, gas line specifications, and available installation space in basement utility area. Prepared comprehensive estimate for removal of existing unit and installation of new tankless system with appropriate venting modifications.
Completed annual maintenance service on 9-year-old system with AprilAire 2400 filter. Inspected mechanical room including water heater, plumbing connections, and ventilation components. Accessed and examined HVAC equipment panels to verify proper installation and condition, noting some minor corrosion on mounting frame that remains within acceptable parameters.
Completed second annual Platinum Level maintenance visit on 4-year-old HVAC system with 16x20x5 filter. Performed comprehensive electrical testing using Fieldpiece SC480 clamp meter, confirming proper frequency readings of 52.4 Hz. System is functioning within specifications and renewal is recommended.
Performed scheduled second annual maintenance visit on a 4-year-old HVAC system per Platinum Level service agreement. Inspected and replaced 16x20x5 filter in the Climatrol furnace unit and examined the Lochinvar water heater for proper operation. Conducted comprehensive inspection of the Armstrong outdoor condensing unit, checking electrical connections, condenser coil condition, and refrigerant levels. All systems functioning properly with no issues identified. Documented maintenance with photos of indoor and outdoor equipment. Customer due for service renewal, with previous maintenance performed in June 2025.
Completed annual Platinum Level maintenance on 6-year-old HVAC system. Replaced 16x20x4 filter and performed comprehensive system service including inspection of outdoor condensing unit. System functioning properly; customer opted to renew maintenance agreement for continued coverage.
Performed routine maintenance on AC system of undetermined age. Inspected interior components including fan assembly, control board, electrical connections, and PVC drainage pipes. System is operating properly with no issues identified during the preventative maintenance service.
Performed complimentary AC system tune-up maintenance as scheduled. Inspected refrigerant lines, valves, and connection points at the equipment. Noted minor oxidation on metal components but system is functioning properly with no immediate concerns identified.
Performed scheduled maintenance on 10-year-old AC system per customer's request. Inspected furnace unit and associated components in utility closet, confirming proper operation. System is functioning correctly with next maintenance recommended in 2025.
