From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, everything happens in a strict order: inducer on, pressure switch closed, igniter glowing, gas valve open, burners lit, flame proven, and finally the blower moving heat through the ducts. Diagnosis is mostly a matter of finding where that chain breaks. In Pearland 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
Catching these issues early helps you avoid costly problems. These are the signals our technicians see most often:
- Grinding or high-pitched squeals from the blower
- Yellow, wavering burner flames where they should be sharp blue
- Loud booms at startup caused by delayed ignition
- Frequent on-off cycling that never reaches the thermostat setting
- Clicking and a glowing igniter with no burner flame
- A fan that keeps running while the registers blow cool air
- Rust streaks, soot, or water around the cabinet or flue
- Burners light, run a few seconds, then shut down repeatedly
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. If you notice any of these signs, call (281) 270-0195 for a prompt inspection.
