remove the furnace door, reach in and touch the blower motor to see if it’s hot. If so, that indicates it tried to start, but can’t. Next, try spinning the blower wheel (HVAC pros call this ...

Furnace igniters work by creating a spark to cause ignition, or by producing an extremely hot surface that ignites the gas as it passes. Blower fan: A small electric fan and motor that directs ...