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Gas fireplace pilot goes out

I have a Monessen 28,000 btu gas fireplace. The pilot keeps going out. It will stay lit for 2-3 cycles of the fan, then goes out. I have to click the piezo 10-15 times to get the pilot lit again, then it will go olut again after 2-3 fan cycles. I can't find any info on the internet on how to troubleshoot this problem...HELP....

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Thermocoupling

Posted on Nov 27, 2008


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Make sure the gas valve is on. The thermocouple may need to be cleaned in order for the pilot to stay lit.

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Gas apliances have safety features built into them so you don't blow yourself up. The pilot heats a thermocoupler which tells the gas valve there is a flame, open the main gas to the burner. If you can see the flame area of the pilot look for a round post about 3/16 inch in diamiter. This should be directly in the flame, if not bend the bracket so it is in one side of the pilot flame. The thermocouple is attached to a mounting bracket. This will be held in place by a 1/4 inch hex screw. remove the screw and the capilary tube leading to the gas control valve. Before you do anything, close the main gas supply to the fireplace and disconnect the power to the fan. You may need to semi dismantle the fireplace to get the thermocouple. The gas valve end is a brass 1/4 pipe thread plug. Turn the outer nut and remove without twisting the tube. Reverse this order to install a new one. Besure not to twist the capilary tube, tighten brass nut 1/4 turn past hand tight. Your better heating supply house will have these in stock. Restarting the pilot will take a few tries because the gas was off. Your gas suplier would charge about $75 to fix this. if you don't have the proper tools and it dosen't look pretty stright forward don't do it. You could get dead.

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