This might sound stupid, but it sounds like opening the cover is triggering a shut down. Usually when it cant detect the temperature increases, it says no light. Its possible it could be the smoke sensor. It detects the heat. Maybe when you open it, its rechecking the systems. But then the stove wouldn't light when you start it again.... You could try this. Tape the switch down with electric tape. Run it a few weeks. If it doesn't do it, it may have a short in the switch. I would replace that first. East coast hearth.com
But if it does do it, it could still be the switch because even if its pressed down it could still not be touching down inside the black box part of the switch... But its more unlikely.
Part pzrp.RF02033660
62 dollars.
It has some black box inside the switch... Maybe its defective on yours. That should stop it. And i since it only happens sometimes, sounds like the.switch.... getting worn. It could be triggering the motherboard to shut down thinking its more than 30 seconds... When you open it, switch immediately goes into over 30 second mode, shuts down... Acts up. Possible the no.light is just an after effect message, not related.
replace the switch. Im sure its that. If your wrong it only cost you 62 bucks.
Unscrew the four grate screws. Carefully not to drop them inside. Pull the grade out. Reach in back un plug the switch take picture first so you know which wire goes where. Use a small wrench or hand to untighten the nut and slide the switch out. Replace with new one. Done.
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