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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A+ Giveaways

May’s A+ Giveaway:

Win 4 tickets to Holiday World & Splashin’ Safari — perfect for a fun-filled day with family or friends!

The lucky winner will be announced on 6/1/25

(see rules and disclaimers for details)

Giveaway Disclaimers:

Winners will be randomly chosen and revealed on the first day of the subsequent month. The average value of giveaway items is $200. Limit one (1) entry per person, and all entries must be submitted within the current month of the giveaway. Participants must reside in our service area as a gesture of our commitment to giving back to our community.

Contest Rules:

To enter, simply fill out the form below with your details. A+Derr Heating & Cooling will examine all entries and hand pick the winner. We will determine the size and model that is needed. All associated materials (including but not limited to: refrigerant, piping, wiring, condensate drain, ductwork, labor} will not be included. Electrical must be up to code prior to installation. Employees and family members of employees are not eligible. Only one (1) entry per household. You do not need to be a customer to enter. The winner must live within our service area. Please do not post any personal information to our Facebook page. There is no cash value; however, the winner will have the opportunity to upgrade their winnings at their own cost. Not to be redeemed with any other special offer or discount. The winner agrees to provide a testimonial of the experience with a photograph of the equipment.

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Membership Perks

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Membership Perks

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

Jake came and did my spring service yesterday. Their service is very professional, they are always out to get the best deals for anything I may need. I purchased new units from them a couple years ago, and the savings has been so noticeable.

Amanda A.

Amanda A.

Texal and his crew came out on time. Had 2 new systems put in. The service was great. Highly recommend.

Beverly G.

Beverly G.

Nicholas has always been so polite and professional. We feel very comfortable having him in our home and know that his inspections are thorough.

Vicki L.

Vicki L.

Awesome service. They make it easy and painless to keep our new HVAC up and running at top efficiency!

Hal B.

Hal B.

Dylan came today for our tune up and as usual, we are very pleased with our service.

Haley B.

Haley B.