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 Columbus 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 Columbus
The sooner you notice these red flags, the easier and cheaper the fix. Watch for these telltale signs:
- Short cycling every few minutes without reaching the setpoint
- Soot, rust, or moisture near the furnace cabinet or vent pipe
- Grinding or high-pitched squeals from the blower
- Clicking and a glowing igniter with no burner flame
- A fan that keeps running while the registers blow cool air
- Flames that start, last a few seconds, and go out again and again
- Booming or banging at light-off from delayed ignition
- A flame that burns soft and yellow rather than steady blue
Act Before It Gets Worse
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Don't wait, call (380) 255-5991 and we'll take a look right away.
