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 Asheville 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
Catching these issues early helps you avoid costly problems. These are the signals our technicians see most often:
- Burners light, run a few seconds, then shut down repeatedly
- Yellow, wavering burner flames where they should be sharp blue
- Grinding or high-pitched squeals from the blower
- A furnace that shuts off every few minutes before the house warms up
- Air moving through the vents that never gets warm
- A bang or boom when the burners ignite late
- Clicking and a glowing igniter with no burner flame
- Rust streaks, soot, or water around the cabinet or flue
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 (828) 307-9793 at the first sign of trouble.
