Rheem Criterion II Furnace-intermittently runs for about 20 second, thermostat is off.
Rheem Criterion II model #RFDG-12EARJR - Its summer and the furnace shouldn't be running, (No central AC). About a week ago I heard what I thought was the furnace start. It ran for about 20 seconds then stopped. I heard it a couple more times. I checked the thermostat and it is set properly. Still experienced the furnace starting, turned off the thermostat and have heard the furnace start. I dont think it produces heat a fan or blower starts then stops. Where should I start to trouble shoot this?
by tdbaca 7 years ago
My Heil furnace is running continously. We replaced the thermostat and it still continues to...run. We placed the thermostate on Auto.
by steven240sx 2 years ago
My gas furnace is blowing cold air some of the time. The burner kicks in for about 10 seconds...then kicks off, then the fan starts.(blowing cold air). Some times it works properly, heating longer and keeping the temperature up. Other times the temperature can drop down lower than the setting, then...
by Audrey Selig 6 years ago
If you program furnace thermostat to a certain degree, will it usually vary one or two deg up & down
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