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Look no further than Relentless Cooling & Heating LLC for all of your residential or light commercial HVAC requirements in Sequin, Texas. We schedule for convenience and without delay Monday through Saturday and include after-hours emergency repairs whenever you need us. As a family-owned business, we take a more personalized approach, listening to your concerns, respecting your property, and treating you fairly. As our name promises, we are uncompromising in our standards of quality.

Are You Looking for Expert HVAC Service in Seguin?

We specialize in replacements, retrofits, and upgrades that make a positive impact on environmental responsibility, running costs, and control over the indoor environment. We are an Elite Tempstar Dealer, opening up access to a versatile, technologically advanced lineup of air conditioners, ductless units, heat pumps, furnaces, VRFs, and more.

We’re Here for Your Systems

The owners of Relentless Cooling & Heating LLC combine more than three decades of hands-on HVAC experience. We’ve tailored our seasonal maintenance protocols to effectively restore peak performance from all makes and models of heating/cooling equipment. We are prepared to resolve the most challenging repairs without repeat visits and offer skilled and knowledgeable indoor air quality solutions, ductwork services, smart thermostats, and an extensive list of services. Get the job done right with Relentless Cooling & Heating LLC.

Heating Service, Furnace Repair, AC Repair, Furnace Service & AC Service in Sequin, TX

AC Company in Sequin, TX | Air Conditioner Service

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Special Offer


20% Off

Military & First Responders

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

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Special Offer


Free Service Call

With Paid Repair

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

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Rated 5/5 on Google!

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.

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.

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.

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.

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.

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.

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.

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.

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