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
Completed planned maintenance visit on 8-year-old HVAC system. Removed furnace front panel and accessed internal components for inspection. Verified 16x25x4 polarized filter housing and checked control board connections, including orange, yellow, and white wire terminations. Inspected blower motor assembly, gas line connections, and PVC condensate drainage system. All mechanical and electrical components operating within normal parameters. System returned to service.
Completed second visit of Platinum Level maintenance on single HVAC system. Replaced 16x25x5 air filter on furnace unit located in mechanical room and renewed two-year service agreement. Inspected both indoor air handler and outdoor Lennox condenser unit, verified proper operation of all components, and documented equipment condition with photographs.
Responded to follow-up site visit for HVAC system installed on 5/13/2026 that failed gas company inspection and could not be pressurized. Upon arrival, documented existing wall damage and framing conditions in installation area with photographic evidence. System remains non-operational pending resolution of gas gauge issue that prevented utility company from activating service. Assessed installation for compliance concerns and coordinated findings with management for next steps to bring system into compliance with gas company requirements.
Completed second annual maintenance visit on 6-year-old single-system HVAC unit as part of Gold Level planned maintenance program. Performed comprehensive inspection and servicing of both outdoor condenser unit and indoor furnace system, replaced 16x20x5 filter, documented equipment condition with photos, and noted customer is due for service agreement renewal.
Completed Platinum Level annual maintenance on 8-year-old single-system HVAC unit. Installed new 16x25x5 filter, performed comprehensive system diagnostics using refrigerant manifold and micron gauge on outdoor condensing unit, and verified all operating parameters within manufacturer specifications.
Conducted comprehensive ductwork assessment in unfinished basement utility space to evaluate existing HVAC distribution system and provide estimate for replacement. Documented current ductwork configuration including large cylindrical insulated supply trunk, metallic flex connections, and rigid metal branch ducts running through exposed floor joists. Identified aged galvanized metal ductwork with flexible ribbed connections showing signs of deterioration, dust accumulation, and potential air leakage points at seams and joints. Evaluated structural clearances, existing routing pathways, and accessibility for new ductwork installation throughout the mechanical space.
Completed second visit Platinum Level maintenance on single HVAC system consisting of Amana furnace and outdoor condensing unit. Performed comprehensive maintenance protocol including filter inspection and replacement of 16x25x5 media filter, system performance verification, and visual inspection of all components. Recommended service agreement renewal due to system age of 5 years to maintain optimal performance and warranty coverage.
Completed comprehensive AC tune-up on 16-year-old residential air conditioning system. Performed standard preventive maintenance protocol including inspection of outdoor condenser unit, capacitor testing, electrical connection verification, and system performance evaluation. Unit currently operating within normal parameters with no deficiencies noted at time of service.
Completed second annual Platinum Level maintenance on 3-year-old HVAC system consisting of outdoor condenser unit and indoor air handler. Performed comprehensive inspection of condenser unit located in exterior side yard between brick structures, verifying proper operation of fan motor, compressor, and electrical components. Checked refrigerant pressures and temperatures to ensure system is operating within manufacturer specifications. Cleaned condenser coils and removed debris from unit exterior and surrounding area. Inspected electrical connections, contactors, and capacitors for signs of wear or deterioration. Verified proper operation of disconnect box and conduit connections. Replaced 20x25x5 air filter at indoor air handler location. Inspected blower motor assembly, evaporator coil, and drain pan for proper operation and cleanliness. Cleared condensate drain line to ensure proper drainage and prevent future blockages. Checked thermostat operation and calibration. Tested system
Completed annual Platinum Level maintenance on a single-system Lennox residential HVAC unit scheduled for installation in February 2026. Performed comprehensive system inspection including control board verification, replaced 20x25x5 air filter, checked electrical connections and terminal blocks, and confirmed proper operation of all system components. All safety indicators functioning correctly, system operating within manufacturer specifications, and photographic documentation captured for service records.
Completed installation of 2-ton, 18 SEER, 99% AFUE Lennox heating and cooling system in residential utility closet, including relocation of outdoor condensing unit approximately 10 feet from original position. System was properly charged, tested with manifold gauges confirming operating pressures within manufacturer specifications, and all components verified operational with appropriate airflow and temperature differentials.
Completed Platinum Level maintenance on a single-zone HVAC system during first scheduled visit for 6-year-old unit. Serviced washable filter, inspected outdoor condensing unit positioned on gravel pad, and verified proper operation of all system components with green indicator light displaying normal status.
Completed annual planned maintenance on one-year-old HVAC system including inspection of electrical controls, wiring connections, and associated mechanical components. Verified proper operation of water heater system, examined manufacturer labels and compliance information, and documented equipment condition with photos showing control box assembly with secured wiring, cable management, and State Industries 50-gallon natural gas water heater unit in serviceable condition.
Conducted comprehensive assessment of existing HVAC system for replacement estimate. Documented current equipment configuration including ductwork connections, air handling components, and window-mounted AC unit with associated condensate drainage system. Evaluated installation conditions and provided detailed photographic documentation to support Green A+ replacement proposal.
Completed full HVAC system installation consisting of a 2.5-ton, 15.5 SEER air conditioning condenser unit and 97% AFUE gas furnace. The Goodman condenser was positioned on a concrete pad foundation against an exterior wall with proper clearances maintained, electrical disconnect installed, and refrigerant lines connected. Interior furnace installation included ductwork connections, with supply air temperature verified at 51.6°F during system testing. All equipment serial numbers documented photographically per specifications, and system commissioned successfully with proper airflow and temperature differentials confirmed.
Responded to service call regarding damaged HVAC flue pipe identified during home inspection. Upon arrival, inspected the vent pipe system in the mechanical room and confirmed significant rust and corrosion on the metal flue pipe and connecting sections. Documented the deteriorated condition of the ductwork, noting discoloration, oxidation on copper connections, and compromised integrity of the venting system. Provided same-day pricing estimate for complete flue pipe replacement to address safety concerns and bring system into compliance with proper venting standards.
Completed Platinum Level planned maintenance on a 6-year-old HVAC system including an ASPT29B1AAB air handler unit. Replaced 16x20x2 polarized air filter, inspected all mechanical components, and verified proper operation of the system and associated humidifier equipment. All equipment found to be operating within normal parameters with no immediate service needs identified at this first annual visit.
Completed follow-up visit to perform leak search on HVAC system in utility closet. Inspected air handler unit, associated refrigerant lines, and PVC condensate drainage system for potential leak sources. Documented equipment configuration including air handler positioning relative to water heater and thermostat wiring at wall-mounted control location for service records.
Completed first annual Platinum Level maintenance on a 9-month-old HVAC system equipped with R-454B refrigerant. Performed comprehensive inspection of all electrical components, circuit boards, and control systems, replaced 16x20x5 air filter, verified proper operation of condenser unit including heat exchanger coils and brass fittings, and documented system condition with photographic evidence showing all components in clean, functional condition with no signs of corrosion or damage.
# HVAC Annual Maintenance Completed Performed annual planned maintenance on a one-year-old Lennox residential HVAC system (Model CK40DT-48C-71, Serial G024J02943). Inspected gas-fired furnace unit and associated equipment in utility room. Changed 20x25x5 air filter per maintenance schedule. Verified proper operation of furnace, examined PVC venting and condensate drainage systems, and inspected ductwork insulation. Checked refrigerant specifications for R-454B compatibility on air conditioning unit. Confirmed all manufacturer labels, safety warnings, and compliance markings are clearly visible and intact. System operating within normal parameters. Customer approved contract renewal for continued annual maintenance coverage.
