Question about Honeywell Programmable Thermostat Heater

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Temperature is not reaching set temperature. Furnace flames twice then stops, then fan kicks in and runs for 5 mins then stops. Then flames twice. Then stops working all together. The flame never burns when the fan is on. I have to go and flip the breaker and the cycle starts again. Please help because my house is freezing. Thanks.

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Tara,
If flames go on and then go right out it is usually a flame sensor problem. These are usually found on newer furnaces with electronic ignition systems. It will be located in the flames of the burner farthest away from the ignitor. If you see an orange glow before the flames light then thats it! If ignitor is on the right side then flame sensor is at the opposite end. It is a round steel probe with a white ceramic top and a wire running to it that sits in the flame and is a little bigger round than a coat hanger. Shut off power, wait to make sure it is cool to the touch, using a piece of steel wool( or sandpaper if none available) give it several good strokes to clean it. You may have to remove it from the top by removing the screw and pulling it out. I usually can clean them without removing them but I have small hands! Turn power back on and it WILL run if that was the problem!!!!!!

Posted on Feb 04, 2010

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