Top-Rated Generator Repair in Louisville, KY | Call Now!
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.

FREE ESTIMATE Schedule Today! Deals & Promotions

Generator Repair Services in Louisville, KY

Many homeowners are turning to whole-home generators as power outages remain a persistent issue in Louisville, KY, and Evansville, IN. Standby generators offer consistent, automatic power delivery to lights, devices, and appliances in the event of a power outage, offering safety and convenience independent of the electrical grid. A+ Derr Heating & Cooling installs generators and is also here for you when your generator needs repair.

For professional generator repair in Louisville and Evansville, contact A+ Derr today.

Signs Your Generator Needs Professional Repairs

When should you call A+ Derr for generator repair? Here are the top signs something is going wrong with your standby generator.

  • Starting difficulty or failure: If your generator takes a while to kick in or doesn’t start automatically when the power goes out, you may have a battery, starter motor, or fuel system issue.
  • Noisy operation: You shouldn’t hear rattling, grinding, or knocking when the generator is on. There may be engine problems or loose components in the unit.
  • Leaks: Any visible fuel, coolant, or oil leak requires quick action to prevent further damage.
  • Self-test issues: Your generator likely runs a self-test each week to ensure it’s ready to go during a power outage. It needs professional diagnosis and repair if it makes strange sounds or doesn’t start correctly.

If you notice any of these signs, call A+ Derr, and we’ll be there to repair them as quickly as possible.

Our Generator Repair Services

When you call us for generator repair in Louisville or Evansville, we follow a streamlined process to get your unit up and running correctly again.

  1. Initial inspection: Your technician will visually inspect the generator, check alerts and error codes, observe unit performance, and check things like fluid and battery levels.
  2. Full diagnostic: The technician will run targeted tests to identify the source of the issue.
  3. Estimate: The technician will explain what’s going on with your generator and provide you with an estimate based on what parts are necessary and how long the repair should take.
  4. Repairs: The technician will work on your generator repairs once you approve the estimate.
  5. Testing: To ensure the repairs were successful, the technician will run the generator and ensure no remaining issues.

Schedule Generator Repairs With A+ Derr Today

A+ Derr has been a household name in Louisville and Evansville since 1975. We are a fourth-generation family-operated company with a 100% satisfaction guarantee and free estimates on service calls. We know how important your home generator is to your peace of mind, so our motto is “Service Today or You Don’t Pay!”

Schedule your Kentuckiana generator repairs with A+ Derr today for trustworthy service you can depend on.

Frequently Asked Questions

Our technicians frequently replace worn-out parts like spark plugs or batteries, fix sensors and electrical components, and flush coolant or fuel systems.

Annual generator maintenance from a professional involves multiple steps, including changing oil, testing coolant, cleaning battery terminals, inspecting and tightening electrical connections, and more.

Start Saving Today With

Membership Perks

Start Saving Today With

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.

Review Image
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.