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 Florence, AL, 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. Any one of them 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 Florence
Spotting the early warning signs lets you act before the problem gets expensive. These are the signals our technicians see most often:
- Clicking and a glowing igniter with no burner flame
- A flame that burns soft and yellow rather than steady blue
- Repeated shutdowns just seconds after the burners light
- Squeals, scrapes, or grinding noises behind the blower door
- Loud booms at startup caused by delayed ignition
- The blower runs constantly but the air never warms
- A furnace that shuts off every few minutes before the house warms up
- Rust streaks, soot, or water around the cabinet or flue
Early Action Saves Money
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 (938) 262-6307 for a prompt inspection.
