A pilot light is a small flame that’s constantly lit within a gas furnace. It’s the ignition source for the main gas burner when it’s activated by the thermostat.

If your pilot light goes out, any appliance ignited by it won't work. Our expects explain the top reasons you may be ...

If the pilot light won’t stay lit, the opening may be clogged. Turn the gas valve off, and clean the opening with a piece of fine wire. If it still won’t stay lit after several attempts, you ...

If the pilot light won’t stay lit or won’t light at all, you may need to have the furnace assembly or sensor cleaned. When’s the last time you changed your furnace filter?