I'm trying to find out why my furnace won't ignite. The pilot light is on, I can hear something turn off when I checked the breaker and it came back on when I turned the breaker back on. If I turn the fan to on it works. I'm thinking it's the thermo coupler but I don't know how to test that. ...

Hey guys, I've been looking through these forums but haven't found an exact answer to my question, so figured I'd start my own thread. I have an American Standard gas furnace that uses a glow plug-style ignition system to light the gas, but the furnace only blows cold air. Let's see if I can get...

I just replaced the flame sensor on my janitrol gmp050-3 and it still won't fire up to produce heat. It does everything but ignite please help it is cold and miserablein the house. Don't know what elese to do.:confused:

Hello, I have problems with my Furnace. I currently have a Lennox G12RD2-82-3 from 1980. Last week I replaced the furnace blower but now the furnace won't ignite. These are the conditions: --the pilot is always on -- I have replaced the thermocouple --the thermostat is OK --the blower kicks on...