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 begin sending warm air into the house. Finding the step that fails is most of the job. Around Spartanburg, SC, 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. Any one of them halts the startup, and from the hallway they all look alike.
For air conditioning breakdowns, see AC Repair.
Signs You Need Furnace Repair in Spartanburg
Spotting the early warning signs lets you act before the problem gets expensive. Here are the most common indicators that it's time to call a professional:
- Squealing or grinding from the blower compartment
- Repeated shutdowns just seconds after the burners light
- Frequent on-off cycling that never reaches the thermostat setting
- Clicking and a glowing igniter with no burner flame
- Water, rust stains, or black soot around the flue or cabinet
- The blower runs constantly but the air never warms
- A bang or boom when the burners ignite late
- A pilot or burner flame that is lazy yellow instead of crisp blue
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call (864) 215-4948 at the first sign of trouble.
