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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Dependable AC Installation and Repair Service in Evansville & Louisville

Your home is the place that you should feel the most comfortable in, but when your air conditioning stops working, it can quickly lead to an uncomfortable environment. When that happens, it’s time to call in the experts at A+ Derr, who can help with any cooling system issues that you might be having.

Having problems with your air conditioning? Give us a call at 833-232-4328 or contact us online!

Why Timely AC Service Matters in Evansville & Louisville

Summers in Evansville, IN and Louisville, KY can push your cooling system to its limits. When temperatures climb, you want an air conditioner that’s dependable and efficient, ready to handle the heat without driving up energy costs. A+ Derr has been part of the Kentuckiana community for decades, helping homeowners keep their systems in top shape so they can stay comfortable through the hottest months.

One of the best ways to avoid disruptions is to schedule regular system checkups before peak cooling season. A tune-up can help your AC run more smoothly, use less energy, and reduce the risk of unexpected problems. If something does go wrong, A+ Derr’s experienced technicians are available day or night to get your home cool again as quickly as possible. With a reputation built on local service and quality workmanship, they’re a trusted choice for keeping your home comfortable all summer long.

AC Installation, Repair & Maintenance Services

Whether you need help with installing an entirely new air conditionerrepairing the one you currently have, or simply having a routine maintenance check scheduled, our team is ready and able to help.

How To Tell If Your AC Unit Needs To Be Repaired Or Replaced

The best way to tell if your air conditioning needs to be repaired or replaced is to have one of our skilled professionals take a look, but there are some signs you can be on the lookout for at home, such as:

  • Your air conditioning blowing out warm air
  • The thermostat not working
  • Strange noises coming from the AC unit
  • Odd smells coming from the AC unit

Want to schedule an inspection with one of our technicians? Call us at 833-232-4328 or schedule an appointment online!

A+ Derr Is A Lennox Premier Dealer

Premier Dealer program logo with clean, professional branding

At A+ Derr, we believe in providing you with the best air conditioning products in the market. That’s why we are proud to be a Lennox Premier Dealer! As a Premier Dealer, we have access to top-of-the-line AC products so that you can benefit from their enhanced cooling power. Lennox systems are energy-efficient, powerful, and reliable.

To learn more about Lennox products or to schedule an air conditioner replacementcontact A+ Derr at 833-232-4328

24/7 Repair Service Available

We know that your air conditioning doesn’t always break during convenient business hours, so we offer 24/7 repair services. Whenever your AC breaks, one of our team members will be here to take your call!

Benefits Of System Maintenance

Having a yearly system maintenance check performed on your air conditioning system helps to identify problems with your system that could become larger issues later. This will protect you against a broken AC and will also save you money on costly repairs later on down the line.

Frequently Asked AC Questions

If your unit is older than 10 years old, it is a good time to start at least considering purchasing a new air conditioning unit.

SEER stands for Seasonal Energy Efficiency Rating and will tell you how energy-efficient your unit is — the higher the SEER number on your unit, the more efficient the unit is.

The cost of a new HVAC or air conditioning system depends on your home and comfort needs. To get you the most accurate cost, please schedule an appointment with one of our comfort advisers. All estimates are free of charge and will ensure you are getting a precise and accurate price. Furthermore, with our 0% financing, we have actually seen AC and HVAC systems pay for themselves.

To calculate the appropriate HVAC system size, we would need to schedule one of our comfort advisers to visit your home. Square footage, windows, insulation and ceiling height are just a few of the relevant items that will determine the type of AC system you need.

Why Choose A+ Derr?

A+ Derr has been proudly serving Evansville and Louisville for almost 50 years and has unsurpassed customer service. You can count on us for free estimates on our replacement quotes and 100% satisfaction guarantee on any product installed by us within the first year.

When you need air conditioning repairs, maintenance, or installations, call the A+ Derr team at 833-232-4328 or contact us online!

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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.

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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.