I have a 10-12year old 80000 BTU Rheem gas Furnace, and it is cycling every 2-3 min. The fan comes on, the igniter heats up and the gas goes on and burns, and then 2-3 min later it shuts off and 1-2 min after it start the same cycle over again. Now I have checked and cleaned the flame sensor...

My 1983 heil model NUGK075DG01, natural gas, forced air furnace is running but only heats the house to 67 degrees no matter how high I set the temp, the fan continuously runs (in auto on thermostat) and the burner will cycle for 3-4 min. then shut-off for 10 min.. I have powered down and back-on,...

My fan and gas shuts off after only a few minutes in the heating cycle and restarts again shortly, only to shut off again... and so on. I think it's the fan limit switch but don't know if I should replace it or try adjusting the limit. Any advice??

I have a Tempstar hvac (heatpump) with a gaspack. It is about 9 years old. I turned the heat on for 1st time this year to discover the problem. I took the cover off to see this happening: I turn the thermostat up and the pilot is one. After a minute of so, the gas turns on and the furnace lights....

I have a Carrier central A/C and a Propane FAG furnace in my basement. The problem is that after the A/C or furnace has shut off, the fans continue to cycle off and on just as if the A/C or furnace was still running.:mad: Sometimes the fans (there is 2 of them, I believe) run continuously and...