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 Towson 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 Towson
Recognizing the warning signs early can save you time and money. Watch for these telltale signs:
- Soot, rust, or moisture near the furnace cabinet or vent pipe
- Repeated shutdowns just seconds after the burners light
- A furnace that shuts off every few minutes before the house warms up
- A bang or boom when the burners ignite late
- A pilot or burner flame that is lazy yellow instead of crisp blue
- Squealing or grinding from the blower compartment
- A fan that keeps running while the registers blow cool air
- The furnace clicks and glows but the burners never light
Early Action Saves Money
Most HVAC failures start small, a weak capacitor, a squealing blower, a system that runs a little longer each week. Don't wait, call (443) 293-9739 and we'll take a look right away.
