Every time your thermostat calls for heat, the furnace runs a fixed checklist. The inducer motor starts and proves draft by closing a pressure switch, the hot surface igniter heats up, the gas valve opens, the burners light, and the flame sensor confirms there is fire. Only after all of that does the blower begin sending warm air into the house. Finding the step that fails is most of the job. Around Orange, CA, the usual failure points are an oxide-coated flame sensor, an igniter cracked by years of heating and cooling, a pressure switch that stays open because of a weak inducer or a clogged condensate trap on a high-efficiency unit, and control boards with burned relays. Each one halts the startup, and from the hallway they all look alike.
For air conditioning breakdowns, see AC Repair.
When to Call for Furnace Repair in Orange
Recognizing the warning signs early can save you time and money. These are the signals our technicians see most often:
- A fan that keeps running while the registers blow cool air
- Burners light, run a few seconds, then shut down repeatedly
- A furnace that shuts off every few minutes before the house warms up
- The igniter glows and clicks, yet no flame ever appears
- Grinding or high-pitched squeals from the blower
- Loud booms at startup caused by delayed ignition
- Rust streaks, soot, or water around the cabinet or flue
- A flame that burns soft and yellow rather than steady blue
Don't Wait for a Total Failure
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. If you notice any of these signs, call (714) 646-1877 for a prompt inspection.
