From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, the sequence is strict: inducer on, pressure switch closed, igniter glowing, gas valve open, burners lit, flame proven, and finally the blower sending heat through the house. Most of the diagnosis comes down to finding the broken link. In Victoria homes, it tends to be the same handful of culprits: a flame sensor coated in oxide, a hot surface igniter cracked by thermal cycling, a pressure switch held open by a tired inducer or a plugged condensate trap, or a control board with a burned relay.
When the AC quits in summer, see AC Repair.
Warning Signs for Furnace Repair
Spotting the early warning signs lets you act before the problem gets expensive. These are the signals our technicians see most often:
- A fan that keeps running while the registers blow cool air
- Clicking and a glowing igniter with no burner flame
- A flame that burns soft and yellow rather than steady blue
- Soot, rust, or moisture near the furnace cabinet or vent pipe
- Booming or banging at light-off from delayed ignition
- Burners light, run a few seconds, then shut down repeatedly
- Short cycling every few minutes without reaching the setpoint
- Grinding or high-pitched squeals from the blower
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 (361) 200-1312 for a prompt inspection.
