The pilot will light, but goes out after releasing the control knob. Detached lead to the pilot electrode, resistance characteristics similar to known good electrode.
pilot will go off every so often, changed the pilot and thermo copler, and still have the same problem?
I have a dean commercial fryer model M35/M40GM replaced the gas valve with a honeywell part # 8071604 then a thermopile 2 wire part # 205T102 pilot still will not stay lit. please help. thank you. rose & bob
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Re: Pilot light will not stay lit
You can not check a thermocouple by resistence. You have to check it by millivoltage when it is hot and sensing it should be above 500mv. I would be willing to bet that you have some type of particulate in the gas valve that is causing this problem.
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Mar 18, 2008 - Similar Questions: light pilot stays till release button suggestions ... If you have held it for a long time and it still won't stay lit, then your thermocouple is bad.... the gas valve doesn't think a flame is burning the gas coming out of the pilot ... less likely but somewhat common is the gasvalve... if the knob you are ...
First locate where to light pilot. You can do this by following thin aluminum colored tubing from control valve to inside heater.In general on top of your gas control valve is a knob. Turn indicator of this knob to pilot and depress knob. This will start gas flow to pilot at end of thin tube. Hold this knob in the depressed position and light pilot. DO NOT release knob for 30 -45 seconds. Then release knob and pilot will remain lit. Then turn knob to on position. If pilot will not stay lit you may need a new thermo coupler, which senses heat from flame to keep pilot gas flow open.
Without a pilot flame sensor signal the pilot light will not stay on and the heater won't work. Try Replacing the pilot flame sensor, the pilot flame burns on to it and it connects to the valve. It looks like a wire.
First clean out pilot light with can of air , or blow down it with a tude. Then brush electrode clean with a clean paint brush ,chech to see if electrode is in the right postion to light the gas not too far away and the spark is strong , Clean thermopile head if fitted, then check thermocuople /thermopile connections are tight . see if this helps .
Remove front cover,or just lower section if you can. they usually just need to be lifted up about an inch or so and pulled out. However some have covers that snap in place. After you remove cover locate gas valve. It should have a control knob on top with markings for on, off, and pilot. Set control to pilot. Follow lines from gas valve to burner compartment, one goes to main burner one ,small copper colored line is the thermocouple, other line is the pilot. Turn thermostat down as far as it will go. Make sure gas supply valve in line to heater is on and then depress pilot control , when you have pilot control depressed have a match or other small flame source close to pilot assembly. If it lights then hold down on pilot control for a couple of mins. Slowly release pilot control and if it stays lit turn gas control to on. Turn thermostat up to call for heat and burner should light. If pilot doesn't stay lit when you release pilot control then try again holding pilot down longer. If it still won't stay lit then thermocouple will need replace. Good luck. Thanks
The problem will be in what senses the pilot is lit. Either a thermocouple or maybe it uses an electrode and flame rectification. If it is an electrode you can try cleaning it. If it is a thermocouple you will have to replace it.
replace the thermocouple. it is a small copper tube that screws into the gas valve and goes to the pilot assembly. a good haedware store that sells heaters will have one. they come in various lengths 18"-48".
You will first need to turn the control knob to pilot. Then depress the control knob button and hold it. Then press the push button piezo igniter several times until pilot lights or open pilot inspection cover and manually light pilot with match/lighter. You may need to hold the control knob for at least a minute. Then release the control knob and if the pilot stays lit then turn the control knob to on. If it does not light then repeat the process again.