Furnace Repair Services in San Marcos, TX
Dependable Furnace Repairs When You Need Them Most
As times get tough, other companies cut corners. But we decided to stay reliable—for over 25 years. Call us for your furnace repair and you'll get:
- Reliable people—Since we constantly train our repair techs, you can be 100% confident that your job will be done right the first time.
- Reliable scheduling— With same-day service and 2-hour scheduling windows, you'll get your furnace repaired at a time that's convenient for you.
- Reliable relationships—Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.
What to Expect: Furnace Repair Costs in San Marcos
- The service call charge: Most contractors charge a service fee to visit your home and diagnose the problem with your furnace. This fee ranges from $50 to $200.
- What’s wrong with the furnace: Not all furnace repairs are equal—some require expensive replacement parts and more labor time, making them more expensive.
- Your furnace warranty: If your furnace is covered under warranty, you may not have to pay as much for your furnace repair.
- From our San Marcos office, Reliable Air serves customers across Kyle, New Braunfels, Wimberly, and Hays County. With a bilingual team, we work with both the English and Spanish-speaking communities.
Call us at (512) 580-8837 or reach out here online to get a free estimate and schedule your furnace service today!

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"I would recommend them to anyone."
Knowing their quality of work, when I needed work on my own home I knew who to call.- James B. -
"I will use you guys again in the near future!"
He knew exactly what needed to be fixed and he was right on it. I thank you all for the quick, fast and in a hurry respond you did for my family and I. Especially during this freezing weather.- Anna A. -
"I am super grateful."
Andy was extremely polite, helpful, and transparent. Reliable Air was able to accommodate my crazy work schedule to service my a/c unit.- Jennifer S. -
"When he arrived he was professional, kind, and we knew we were in good hands."
He fixed our AC and was out in 45 minutes. Best of all we had no outrageous service call fee and saved us money. We definitely will use Reliable Air again and highly recommend them for your heating and air conditioning needs!- Amanda N. -
"I am very happy with the professional informative technicians and office people at Reliable Air."
I HIGHLY recommend this San Marcos company who now does plumbing. Today they installed my new water softener and I am very happy with their service.- Lisa R. -
"They will mail you a reminder that it’s time to have it done again and that is very helpful."
Reliable Air off always does an excellent job of kit cleaning and servicing my air conditioner and heater.- Connie D. -
"I highly recommend their service."
Edgar explained in detail what he would be doing, along with the issue he found in terms that any home owner would understand.- Steve S. -
"Thank you JW!"
JW was very professional, checked the system out top to bottom, quickly identified the issues and hopefully, will be tasked with getting our heat system up and running after speaking with owner.- Daryl F.
Common Heat Pump Repairs
- Replacing defective blower motor: $450 to $1,200+
- Replacing bad control board: $300 to $400+
- Repairing faulty ignitions: $100 to $300+
- Fixing broken flame sensors: $100 to $250+
- Repairing/replacing heat exchanger: $100 to $300+ for repairs, $1,200+ for full replacement
You can learn more about the cost to repair a furnace by reading our article, “How Much Does a Furnace Repair Cost in San Marcos?”
Want an Accurate Repair Cost?
We can come to your home and find the problem for $99*.
*Diagnosis fee applies only to normal business hours (Monday–Friday: 7am–5pm). Diagnosis fee increases to $119 after normal business hours.

How Our Process Works
- Schedule Your Repair - We make it easy for you to schedule your duct repair service. Just give us a ring at (512) 580-8837 or use our online appointment scheduler. We offer 2-hour scheduling windows. We will send you a confirmation, so you’ll know when we’re arriving.
- Notify You Before We Arrive - Your service technician will call you when they’re 30 minutes out. This way, you won’t have to wait around, wondering when they’ll get there.
- Give You a Price - Prior to your service, your technician will inspect the areas that need repairing. They’ll also provide you with upfront and transparent pricing, so you never have to worry about receiving a surprise bill.
- Complete Our Work - Once you’ve signed off on the quote, your technician will get straight to work. They’ll also let you know how long the service will take, so you can have peace of mind about how long they’ll be working in your home.
- Make Sure You're Happy - No matter the job, each member of our team values efficiency and a job done right. To ensure that we lived up to your expectations, we’ll request feedback on our performance after the job is complete. We have a 100% satisfaction guarantee— and we mean it.

Why Choose Us?
As times get tough, other companies cut corners. But we decided to stay reliable for over 29 years. Call us and you'll get:
-
Many of our employees stay for 10+ years. So you'll always hear a familiar voice on the phone or see a familiar face at your door.
-
With same-day service and 2-hour scheduling windows, you'll get service at a time that's convenient for you.
-
Since we constantly train our employees, you can be 100% confident that your job will be done right—the first time.