Heater Maintenance in Louisville & Evansville | Book Tune-Up
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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Comprehensive Heating Maintenance in Louisville & Evansville

Heating systems may not be cheap, but they are essential to maintain your household’s health and comfort in the cold, rainy winters of Evansville, IN, and Louisville, KY. To protect your investment and comfort, keep up a twice-yearly schedule of HVAC maintenance. Your annual heating maintenance service should ideally take place in the fall to get ready for when the cold swoops in.

A+ Derr Heating & Cooling offers comprehensive heating tune-ups for all types and brands of furnaces, boilers, and heat pumps. Let us reassure you that your heater will take care of you through the coming years and whenever you need it most.

Call A+ Derr at 833-232-4328 or contact us online to schedule your heating maintenance appointment in the greater Evansville and Louisville areas!

Benefits of Heating Maintenance

You probably maintain your car, your garden, and many other things inside and outside your home. Your heater needs maintenance, too. The modest amount of money and time this takes will pay off big in the long run by:

  • Keeping your furnace, boiler, or heat pump operating efficiently, which prevents the wear and tear of an overworked heater, and saves money on your utility bills.
  • Discovering and fixing small issues so they don’t develop into large, expensive problems.
  • Extending the service life of your heater by years.
  • Reassuring you that your heater won’t break down on the coldest day of the year.
  • Keeping you compliant with your warranty, so the manufacturer can’t deny coverage if something malfunctions.

To safeguard your comfort, and protect your heater for the long haul, make a heating maintenance appointment in Evansville or Louisville by contacting A+ Derr at 833-232-4328 today!

What To Expect From a Heating Tune-Up

Zoomed-in view of a furnace system with focus on the control panel with a technician performing heating maintenance

At your annual inspection and tune-up, our heating maintenance technicians will check all major components of your system for issues and adjust, clean, and/or calibrate them for optimum efficiency. Specific tasks your technician will perform include:

  • Clean all dust and debris
  • Inspect and test safety controls
  • Check and tighten electrical connections
  • Replace the air filter if needed
  • Lubricate parts to reduce wear
  • Look out for any issues with your system

Make your appointment for a heating tune-up in the Kentuckiana region with A+ Derr by calling 833-232-4328 or reaching out online!

Systems We Serve

If you need new heating equipment for your home, we are able to install and work on:

Call 833-232-4328 or contact us online to schedule a maintenance appointment in the Kentuckiana area.

Sign Up for a Maintenance Plan

A+ Derr designed a maintenance plan to ensure their loyal customers never skip essential HVAC maintenance and keep their heaters and air conditioners in great shape. With our Ultimate Savings Agreement, Evansville and Louisville homeowners get two seasonal HVAC tune-ups, priority 24-hour service, and discounts on repairs, reduced fees on service calls, and more!

Sign up for a maintenance plan with A+ Derr by calling 833-232-4328 or contacting us online today!

Heating Maintenance FAQ


It’s best to schedule heating maintenance once per year, ideally in the fall before the heating season begins. In areas like Evansville and Louisville, where winters can be cold and damp, annual tune-ups ensure your furnace, boiler, or heat pump runs efficiently and safely all winter long.


Routine heating maintenance helps prevent breakdowns, lower energy bills, and extend your system’s lifespan. During a tune-up, our A+ Derr technicians inspect and clean components, check safety controls, tighten connections, and test performance to ensure your system runs at peak efficiency all season.


Our comprehensive tune-ups include:
• Cleaning dust and debris
• Inspecting safety controls
• Checking and tightening electrical connections
• Replacing filters as needed
• Lubricating moving parts
• Testing airflow and calibration
• Identifying and addressing early warning signs before they cause costly repairs


We maintain and install a wide range of systems, including furnaces, boilers, heat pumps, mini-splits, geothermal systems, and packaged units. Whether you need heating maintenance or a full replacement, our certified team can handle any brand or model.


Yes! Our Ultimate Savings Agreement gives Evansville and Louisville homeowners two seasonal HVAC tune-ups each year, priority 24-hour service, and discounts on repairs and service calls. It’s the easiest way to keep your system running smoothly year-round while saving money.


Since 1975, A+ Derr has been a trusted, family-operated HVAC company serving Evansville, Louisville, and the Kentuckiana region. We offer free estimates, 24/7 emergency service, and our unique “Service Today or You Don’t Pay” guarantee. Our fourth-generation technicians take pride in delivering professional, honest service backed by decades of expertise.

Come to A+ Derr for Your HVAC Maintenance Needs

Since 1975, our fourth-generation family-operated company has operated in Evansville, Indiana, and Louisville, Kentucky. A+ Derr Heating & Cooling offers free estimates on replacement quotes and service calls. We’re available 24/7 to help you out in emergencies, and we live by the motto, “Service Today or You Don’t Pay!”

Let A+ Derr provide you with expert heating maintenance and tune-ups. Call 833-232-4328 or contact us online!

Why Do Evansville and Louisville Homeowners Trust A+ Derr Heating & Cooling for Furnace Replacement and Seasonal Tune-Ups?

For over five decades, A+ Derr Heating & Cooling has been a trusted source for reliable furnace replacement, seasonal tune-ups, and prompt emergency service for homeowners in Evansville, IN, and Louisville, KY. Fourth-generation, family-owned A+ Derr brings both local integrity and the most current industry-leading HVAC know-how to homes and businesses in Kentuckiana, protecting families, keeping systems running efficiently, and providing comfort all year long.

1. Lennox Premier Dealer Excellence

Certified by the manufacturer as a Lennox® Premier Dealer, A+ Derr ensures that all of its technicians are factory-trained, up to date on the latest installations and repair requirements, and routinely certified in the products and services they offer. Homeowners can trust A+ Derr to provide expert installation of high-efficiency, energy-saving, quiet, long-life Lennox furnaces and heat pumps for Kentuckiana homes.

2. Fast, Professional Service

Boasting one of the region’s largest service fleets, A+ Derr is able to offer same-day heating repair and maintenance appointments. Their “service today or you don’t pay” guarantee offers reassurance that homeowners will not have to wait days for relief during a winter cold snap, but will receive service promptly when needed.

3. Expertise Across All Heating Systems

Gas or electric furnace replacement, boiler service, or heat pump maintenance, A+ Derr technicians are factory-certified to handle it all. No matter what kind of heating system, customers in Evansville and Louisville can expect accurate diagnostics, safe installation, and the highest system efficiency possible.

4. Seasonal Tune-Up Precision

Seasonal furnace and heat pump tune-ups are relied on by homeowners to prevent breakdowns, extend the life of a system, and minimize energy bills. A+ Derr maintenance service includes safety checks, cleaning, airflow testing, and component calibration — all for predictable heat output through Evansville and Louisville’s unpredictable winters.

5. Transparent Pricing & Local Trust

Longtime customer trust has been built by A+ Derr’s up-front pricing, free estimates for new installations, and 100% satisfaction guarantee. Technicians both live and work in the same communities they service — from Newburgh to Jeffersonville — giving homeowners the peace of mind that comes with service that is local and dependable.

Summary:
Homeowners in Evansville and Louisville choose A+ Derr Heating & Cooling because the company offers certified Lennox heating replacements, expert seasonal tune-ups, transparent service pricing, and a dedication to getting the job done right, right the first time. This is backed by a legacy of honest, family-owned care for five decades and counting.

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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.