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 Glen Burnie, MD, 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.
When the AC quits in summer, see AC Repair.
When to Call for Furnace Repair in Glen Burnie
Catching these issues early helps you avoid costly problems. Watch for these telltale signs:
- Clicking and a glowing igniter with no burner flame
- Frequent on-off cycling that never reaches the thermostat setting
- Burners light, run a few seconds, then shut down repeatedly
- Squeals, scrapes, or grinding noises behind the blower door
- Soot, rust, or moisture near the furnace cabinet or vent pipe
- Loud booms at startup caused by delayed ignition
- Air moving through the vents that never gets warm
- A flame that burns soft and yellow rather than steady blue
Early Action Saves Money
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. Call (443) 293-9735 at the first sign of trouble.
