Question about Heating & Cooling
The glow plug gets hot and the 3 jet burners start but within 10 seconds before the fan starts, they go out and the cycle starts again. I removed the bottom door that keeps the kill switch pushed in and held the switch myself and the burners stayed on but replace the door and poof, out go the burners.
That makes no sense? the door on does exactly the same thing as you holding the switch closed and neither has anything to do with the problem you are describing. if door were off nothing would happen. if door was on ,nothing would happen unless the switch was closed. it may be coincidence, but sounds like the unit is not proofing the flame. look for a little needle like sensor that protrudes into the flame path in front of a burner. when the burners light it senses flame and tells gas valve burners lit and its ok to stay on. then heat builds and the fan is briught on. once in a blue moon the overtemp sensor trips open prematurely as soon as the burners start to heat up. it is a little wire in , wire out sensor above the burners that protreudes into the bulkhead above the burners. if it is cold and open its bad. if you jump it and burners light and stay lit and fan comes on its bad. fairly cheap and easy to replace. you may have an old fan limit switch the rotates like a spring to bring the fan on as it heats up, then turns off burner if its gets to hot or is set to low. it also turns fan of as burners cool down.
Posted on Dec 05, 2008
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Posted on Jan 02, 2017
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