From the hallway, a furnace that will not heat looks the same no matter what broke. Inside the cabinet, though, everything happens in a strict order: 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 Lansing 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.
When the AC quits in summer, see AC Repair.
When to Call for Furnace Repair in Lansing
Spotting the early warning signs lets you act before the problem gets expensive. Watch for these telltale signs:
- Yellow, wavering burner flames where they should be sharp blue
- The igniter glows and clicks, yet no flame ever appears
- The blower runs constantly but the air never warms
- A furnace that shuts off every few minutes before the house warms up
- Grinding or high-pitched squeals from the blower
- Rust streaks, soot, or water around the cabinet or flue
- Booming or banging at light-off from delayed ignition
- Burners light, run a few seconds, then shut down repeatedly
Act Before It Gets Worse
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. If you notice any of these signs, call (517) 200-4764 for a prompt inspection.
