When I first turn on the heat, the gas furnace lights up appropriately, it heats and then the fan turns on and blows the warm air. After about 1-2 hours, the air is still blowing but it is now cold air. In order to get it hot again I turn the breaker to the furnace on and off and the cycle starts...

Hello - my apartment heater is blowing cold air. I was told by maintenance folks to turn up my water heater (Rheem Model #42V50-65F Gas). It's already turned up almost to max, and I didn't have this problem over the last two winters. My water heater was recently replaced - could this be part of...

I have York diamond 80 furnace. It is about 12 years old and works fine. Except one problem happens intermittently. Once a day or a few days, the furnace blows hot air. Once it reachs the set temperature, it will not stop and keep blowing hot air and then Change into room temperature air. Turning...

I have a 2006 trane furnace and it keeps blowing cold air! The temp on the screen alwasys goes back to 69 degrees, so I turn it up because it is so cold in my house. It stays at the temp for a couple hours then goes back down. I had just went out for a couple hours and when got back home the temp...

My heater at home is blowing cold air -- I have the thermostat set to 75 degrees and it says the HEAT to indicate it is on. What's the problem?