I have an old Rheem 80. My problem is the pilot lights, main burner lights, but circulating fan does not start. After a couple minutes with no main fan, burner goes out. If I put the fan in "ON" mode instead of "Auto" and then turn on furnace, pilot lights, main burner burns and heater works. ...

Of course, just as a cold snap is about to hit, our furnace quits working. Having fixed it successfully the last couple of times it quit - once due to the intermittent pilot ignition control module packing it in and once when a small spring had broken which was supposed to push on a micro-switch...

Of course, just as a cold snap is about to hit, our furnace quits working. Having fixed it successfully the last couple of times it quit - once due to the intermittent pilot ignition control module packing it in and once when a small spring had broken which was supposed to push on a micro-switch...

Hi There, I have a gmp 1 00-4 Gas furnace. I guess it is more than 10 years old since the house is built in 1995. The furnace was working fine last year, but this year, it stopped working. I have searched the internet and followed some of the instructions and here are the status: Call for...

The main burner will not light! The pilot stays on fine but when the thermostat is raised, the main burner won't light. I've checked the electrical box, everything is fine. I even changed the thermostat but it still will not ignite the main burner. Help, I'm freezing!