From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, the sequence is strict: inducer on, pressure switch closed, igniter glowing, gas valve open, burners lit, flame proven, and finally the blower sending heat through the house. Most of the diagnosis comes down to finding the broken link. In Niagara Falls homes, it tends to be the same handful of culprits: a flame sensor coated in oxide, a hot surface igniter cracked by thermal cycling, a pressure switch held open by a tired inducer or a plugged condensate trap, or a control board with a burned relay.
For air conditioning breakdowns, see AC Repair.
Warning Signs for Furnace Repair
The sooner you notice these red flags, the easier and cheaper the fix. Here are the most common indicators that it's time to call a professional:
- The blower runs constantly but the air never warms
- Repeated shutdowns just seconds after the burners light
- A bang or boom when the burners ignite late
- Grinding or high-pitched squeals from the blower
- A flame that burns soft and yellow rather than steady blue
- Water, rust stains, or black soot around the flue or cabinet
- Clicking and a glowing igniter with no burner flame
- Short cycling every few minutes without reaching the setpoint
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. Call (716) 209-3225 at the first sign of trouble.
