POF low limit sensor adjustment?

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Deadeye

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Nov 28, 2012
9
I am having issues with my St. Croix Element. About 50% of the time I have to start it twice. I flashes a code 3 for no flame. I have cleaned everything including the exhaust fan housing. I have replaced the POF sensor. I can even force feed the burn pot on start up and watch the code set during a nice big flame. My POF sensor is mounted on an adjustable bracket. I cannot find any info on the setting of the gap. Should the sensor be touching the fan housing, or should there be an air gap?
 
NO air gap! It should be right against the house for it to sense the temp of the housing. Make sure there are no ashes, etc, between them.
 
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NO air gap! It should be right against the house for it to sense the temp of the housing. Make sure there are no ashes, etc, between them.

That's what I thought. It came from the factory with about 5/32" gap. When I changed the sensor I narrowed the gap using a box top out of the kitchen as a feeler gauge. I wonder how its been working as good as it has. Thanks for the reply!
 
You're welcome! I maintain an old Earth Stove for a friend, a manual light model that's a nuisance to fire up. It was going out at night when they put it on Low, resulting in a cold house and a PITA to relight. I finally found that its POF switch had come loose from the casting because a screw fell out some time, and the switch wasn't sensing the casting temp properly. A new screw and all is well. Lesson learned.
 
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