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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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Featured Specials

Free Second Opinion

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On HVAC Repair Or Replacement Quotes
Don't Pay More Than You Should
Competing quote must be presented at time of service to qualify for free second opinion.
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New AC

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As Low As $63 / Month

Limited Time Offer
Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.
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Our Promotions

Free Second Opinion

On HVAC Repair Or Replacement Quotes Don't Pay More Than You Should Get Offer Expires 06/30/2026 Competing quote must be presented at time of service to qualify for free second opinion.

New AC

As Low As $63 / Month
Limited Time Offer Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

SAVE $2,026

On New HVAC Systems
Limited Time Offer Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

WHOLE HOME UPGRADE!

FREE Water Heater
With HVAC System Replacement Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

GET STORM SEASON READY

Transfer Switch • Smart Monitor • 1 Year Maintenance
INCLUDED With Your Generator Install Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

TWO TOILETS. ONE PRICE.

Get Your Second One On The House
Limited Time Offer Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

BETTER WATER STARTS HERE

FREE In-Line Filtration System
With Every Water Heater Install Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

Air Quality Upgrade

Buy One, Get One 20% Off
On Qualifying Air Quality Products & Services Get Offer Expires 06/30/2026 Cannot be combined with other coupons or offers. Restrictions apply. See dealer for details.

Plumbing Safety Check + Flush

$49 Tank
$99 Tankless
Healthy Plumbing Starts Here Request Service Expires 06/30/2026 Restrictions apply, call for details.

FREE

HVAC Replacement Estimates Schedule Yours Today! Get Offer