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 Folsom 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.
Cooling trouble instead? See AC Repair.
When to Call for Furnace Repair in Folsom
The sooner you notice these red flags, the easier and cheaper the fix. These are the signals our technicians see most often:
- The furnace clicks and glows but the burners never light
- Squeals, scrapes, or grinding noises behind the blower door
- Repeated shutdowns just seconds after the burners light
- A furnace that shuts off every few minutes before the house warms up
- A flame that burns soft and yellow rather than steady blue
- A fan that keeps running while the registers blow cool air
- Rust streaks, soot, or water around the cabinet or flue
- Loud booms at startup caused by delayed ignition
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 (279) 236-7586 at the first sign of trouble.
