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Living up to our name, Relentless Cooling & Heating LLC is unwavering in our standards of quality and workmanship. Our determination to achieve successful outcomes for each and every client sets us apart. We simply do not consider a job done until we’ve earned your satisfaction. Founded in 2021, our HVAC company is family-owned, and local and brings together more than thirty years of industry experience. For home and business owners in Marion, we provide a proven reliable source of excellence.

We’re Proud to Serve Marion with Expert HVAC Service

As an Elite Tempstar Dealer, Relentless Cooling & Heating LLC offers an impressive selection of today’s leading heating and cooling innovations. Explore exciting features in central air conditioning, electric heat pumps, ductless mini-splits, versatile VRFs, powerful furnaces, and more with us!

Call on the Experts Today

Give us a call at (830) 282-4633 with confidence in fair treatment, competitive pricing, and honest answers. Schedule HVAC installation, replacements, seasonal maintenance, or repairs Monday through Saturday. Choose us to resolve issues with indoor air quality, duct sealing, duct cleaning, smart thermostats, and a long list of helpful services. We make improvements that reduce carbon footprint, monthly costs, and concerns. Relentless Cooling & Heating LLC is also available after-hours, handling emergency needs in Marion quickly, effectively, and 24/7!

Furnace Repair, Air Conditioning Installation, AC Repair, Air Conditioner Service & AC Service in Marion, TX

Furnace Company in Marion, TX | Air Conditioning Installation

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Special Offer


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With Paid Repair

Exclusions apply. Call (830) 282-4633 for details. While supplies last.

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Rated 5/5 on Google!

Thank you for replacing my ac and all the work you did to fix my ductwork. Cruz is very reliable, friendly, and knowledgeable. And affordable.

Ana A.

Best in the game. Top of the line work and for a respectable price. Highly recommend them for all of your HVAC needs.

Erik S.

Called the company in the morning after realizing the AC had gone out and by 11:30 that morning AC was working again. Very impressed, so we will have them come back for routine maintenance.

Natalia O.

We were referred by a friend to call Relentless and thank goodness for them! They were honest and upfront and even let us know our system was probably still under warranty, which it was.

Nicole D.

Shout out to Relentless Cooling and Heating!! Their affordability and timelines is outstanding! I highly recommend them for all of your AC needs!

Brandi M.

Man I cannot thank Danny enough!!! He came and fixed the A/C real quick! It has been out for months. Not to mention how quickly he came out to service us.

Saul C.

Very professional and honest, extremely knowledgeable gives great information about what’s going on. Thank you for the help Relentless cooling and heating.

Nina B.

These guys have a great attitude and awesome work ethic. They’ll go above and beyond if they have to and when needed! They tackle projects head on and the end result is always quality work!

Chris S.

They were very responsive and communicated with me at all points, very reasonable and fair rates. I have used them for several of our rental properties and do awesome work as well as clean up after job is complete.

John Z.

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Marion, TX