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 moving heat through the ducts. Diagnosis is mostly a matter of finding where that chain breaks. In Eagan 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.
When to Call for Furnace Repair in Eagan
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
- Grinding or high-pitched squeals from the blower
- Short cycling every few minutes without reaching the setpoint
- Rust streaks, soot, or water around the cabinet or flue
- The igniter glows and clicks, yet no flame ever appears
- A pilot or burner flame that is lazy yellow instead of crisp blue
- Repeated shutdowns just seconds after the burners light
- Air moving through the vents that never gets warm
Early Action Saves Money
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call (507) 203-9216 at the first sign of trouble.
