Question about Heating & Cooling
Coleman Furnace Model 7680B Series 856
Sometimes this furnace runs perfectly, but about once a day the fan seems to get stuck or something and it keeps going on and off every 5 to 10 seconds---when it does this there is no fire in the box, just the pilot light is on. I have to turn ithe furnace off for about 30 minutes and then it will run okay for about six hours or until it does it again. Any ideas? It has 3 limit switches that I am aware of.
Clean your heat/flame sensor with sand paper or steal wool. If the sensor is dirty, it won't detect the heat from the flame and it shuts the gas off. Clean the soot and junk off the sensor and it should work fine. I have to clean mine every year. After spending hundreds of $$ every yr on tech calls..I figured out the problem and in 30 sec I'm up and running again.
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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