In the first photo it looks as though you have a copper tubing reducer on the intake air. Am I correct? Or am I not looking at it corrctly?
You should be able to see the back of the control board by looking in the inside of the stove....may have to remove a cover? Usually the stat connections are on the rear of the board.
I would almost tink that you would want more air than what would go through a 3/4" or 1" pipe.
Even though the pic is blurry, I'll take a guess that it IS the stat jumper wire. If so, that's NOT your problem.Here are some pictures of the back of the control board. Looks like a sealed unit to me, but the red wire at the top looks very like what John C posted in a previous picture. Could this be the stats jumper? I can't see the bottom because of the blower fan. But I think this might be the jumper and it looks like it is in place. And if so, does this mean this is NOT my problem?
In the original post you said that it burns for about 45 minutes and then the fire goes out? I just want to be sure I'm understanding correctly
I agree with imacman, I bet that it is the jumper wire. Even if it was that wouldn't stop the auger from feeding, it would just stay in low fire if it works like my stove. If you haven't already done it I would do a thorough cleaning,m top to bottom, front to back. If you don't have a manual for it try to find one online. It should give you step by step cleaning instructions. Also, see if you can make sure that the auger is free and not partially jammed or stuck. The other thing does the room fan start up? If that blower doesn't start up the stove will over heat and shut down.
The very first thing to do is to make sure that the connections on that jumper are tight and not oxidized because if they are loose or oxidized the controller will act like there is no jumper there.
How do I do this, it is very hard to get at the back of the control panel?
If your damper is set for burning more pellets than are being delivered after a while there will not be enough fire in the burn pot to keep the POF (proof of fire) system closed this leads to the stove entering shutdown (auger stops, and so forth).
So after having verified the jumper is actually making solid contact I would then check and clean the POF system.
Also, see if you can make sure that the auger is free and not partially jammed or stuck.
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