Every time your thermostat calls for heat, the furnace works through 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 start pushing warm air into the house. Finding the step that fails is most of the job. Around Redding, CA, the usual failure points are a flame sensor fouled with oxide, 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.
When the AC quits in summer, see AC Repair.
Signs You Need Furnace Repair in Redding
Recognizing the warning signs early can save you time and money. Keep an eye out for the following clues:
- Frequent on-off cycling that never reaches the thermostat setting
- Loud booms at startup caused by delayed ignition
- Air moving through the vents that never gets warm
- Repeated shutdowns just seconds after the burners light
- Squeals, scrapes, or grinding noises behind the blower door
- A flame that burns soft and yellow rather than steady blue
- Rust streaks, soot, or water around the cabinet or flue
- Clicking and a glowing igniter with no burner flame
Act Before It Gets Worse
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. At the first hint of a problem, call (530) 201-3595 for a fast inspection.
