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 Malden, MA, 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.
Signs You Need Furnace Repair in Malden
Recognizing the warning signs early can save you time and money. Keep an eye out for the following clues:
- Loud booms at startup caused by delayed ignition
- Water, rust stains, or black soot around the flue or cabinet
- The igniter glows and clicks, yet no flame ever appears
- Grinding or high-pitched squeals from the blower
- Air moving through the vents that never gets warm
- Flames that start, last a few seconds, and go out again and again
- A furnace that shuts off every few minutes before the house warms up
- A flame that burns soft and yellow rather than steady blue
Don't Wait for a Total Failure
A failing capacitor, clogged condensate drain, or dirty flame sensor rarely fixes itself and usually gets more expensive to address the longer it runs. If you notice any of these signs, call (339) 600-1190 for a prompt inspection.
