No two heating systems break the same way, and in San Antonio homes the first question on any no-heat call is what kind of equipment we are dealing with. Gas furnaces most often stall on an oxidized flame sensor. The burners fire, the sensor fails to confirm the flame, and after three attempts the control board closes the gas valve and locks the system out. Cracked hot surface igniters, sticking pressure switches, plugged condensate traps on high-efficiency units, and tired blower motors round out the usual list. Heat pumps have their own failure patterns. A defrost cycle that underperforms lets ice build up on the outdoor coil, a bad reversing valve leaves the system stuck in cooling mode, and a dead outdoor unit hands the whole load to the electric backup strips, which cost several times as much to run.
Most of our service calls are for Furnace Repair. If something has stopped working, start there.
Warning Signs for Heating Repair
Recognizing the warning signs early can save you time and money. These are the signals our technicians see most often:
- Clicking and failed ignition attempts before the furnace gives up
- Strange smells from the vents, especially rotten egg or burning
- Frequent on-off cycles that never bring rooms up to temperature
- A heat pump's outdoor unit encased in frost or ice
- The thermostat calls for heat but the vents blow cold air or nothing
- Heating bills spiking while comfort keeps falling
- A loud boom when the burners light, which points to delayed ignition
- Some rooms warm while others stay stubbornly cold
Early Action Saves Money
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. If you notice any of these signs, call (826) 212-7453 for a prompt inspection.
