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You may need a new pilot assembly. Typically one of two issues result from a bad pilot assembly:
1. The pilot won't stay on after lighting it
2. Pilot stays on but logs won't light.
Depending on the unit, you may need a new thermopile or a whole new pilot assembly.
Make sure the pilot knob is turned from "pilot" to "ON" or it will never run.
If the pilot knob is "ON", and the pilot is lit, but the burner won't light, it could be a bad Thermopile. The thermopile is the other safety mechanism in the pilot assembly that controls the burner.
If the pilot light will light at all but not have a good strong flame I would remove pilot assembly and clean it thourghly,being careful not to damage pilot orifice. Reinstall pilot and seeif you have any improvement. If pilot still won't stay lit I would replace thermocouple being careful to make sure top inch or so is in pilot flame. Hope this helps. Thanks
If your pilot light will not stay lit when you release pilot light button then chances are that your thermocouple is bad. Make sure that the tip of thermocouple is directly in line with pilot light. Tip of thermocouple should be cherry red if it is properly placed. If pilot will not stay lit then replace it. If you aren't sure about placement of thermocouple you can heat thermocouple with a seperate heat source. If you do this and pilot light stays lit then reposition thermocouple in pilot flame. If it still won't keep pilot burning then replace thermocouple. Hope this helps. Thanks.
Try cleaning the orfice for the pilot light. You will have to dis-assemble the fuel lines from the thermostat to the burner to get at it. The orfice has an extremly small hole in it, do not make it any larger, just clean it out.
there is a small adjustment screw on the gas valve,turn it clockwise to increase pilot,if that does not work the vent cap on the gas regulator on the back of the unit could be stopped up,remove that cap ,clean out or replace unit can operate without it just fine.If you increase the pilot and it still wont stay lit replace the thermocouple
get a long stick match, a flashlight remove lower inspection cover, find thermocouple and pilot light will be next to it,turn gas valve to pilot light and hold down,stick the match in by thermocouple till the pilot lights and hold valve down till pilot stays lit,this may take a minute or more,then release gas valve and see if pilot stays lit, if not retry,if it wont stay lit,the thermocouple is defective and needs replacement
crappy pilot flame (not properly heating the thermocouple), bad thermocouple, thermocouple loose where it screws into the pilot safety valve, bad safety valve magnet.
One or more of those is the problem.
Oh...there is also a saftey switch...in case it tips over. It will also cause the pilot to not stay lit (if the switch or wires that go to i are faulty)
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