Furnace Repair Cost in San Antonio (2026 Guide)
When the heat quits on a cold January night, you want two things fast: someone who answers the phone, and a straight answer on price. Here is what the most common furnace repairs actually cost in the San Antonio area, installed.
Common furnace repairs and what they cost
| Repair | Typical cost | The symptom you will notice |
|---|---|---|
| Flame sensor clean or replace | $149–$249 | Furnace lights, runs 5–10 seconds, then shuts off |
| Thermostat replacement | $185–$450 | Blank or unresponsive thermostat screen |
| Furnace ignitor | $249–$385 | Furnace clicks but never lights |
| Control board | $385–$795 | System completely dead, no lights in the cabinet |
| Gas valve | $489–$789 | Ignitor glows but the burner never lights |
| Blower motor | $550–$1,200 | Little or no airflow at the vents |
| Heat exchanger | $2,500–$4,500 | Yellow or flickering burner flame instead of steady blue |
Most furnace calls we run end up in the first three rows — a few hundred dollars, not a few thousand.
Our repair-first promise
We are a repair-first company. If your furnace can be fixed safely and the fix makes financial sense, that is what we will do — even though selling you a new system would make us more money. We will only bring up replacement when the heat exchanger is cracked, the furnace is past 15 years old with a major failure, or the repairs are adding up to more than the furnace is worth.
When replacement does make sense, we will tell you exactly why and show you the numbers both ways.
What a service call looks like
- You call or text and describe what the furnace is doing — or not doing.
- We schedule a visit, often same-day during cold snaps.
- A trained technician from our own in-house crew diagnoses the problem and gives you the exact repair price before any work starts.
- You approve it, we fix it, and the heat is back on.
Keep it from happening again
Most no-heat calls trace back to maintenance items — a dirty flame sensor, a clogged filter stressing the blower, a weak ignitor that was going to fail eventually. A one-time tune-up is $149, and our Comfort Club is $250 a year and includes a 21-point inspection that catches these parts before they strand you on the coldest night of the year.
Text us a photo of your furnace and what it is doing — Clint will tell you what he thinks is going on and what it should cost before anyone even rolls a truck.