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T-stat calls for heat

The pilot lights but when the t stat calls for heat it shuts off the pilot off.

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Re: t-stat calls for heat

Most likley problem is the could be the valve but i would replace the thermopile first,its a cheap imperial for it.its also easy to replace.also make sure all wire connections are good,clean and tight.

Posted on Nov 11, 2007

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Fryer cut off but pilot stays on

You could have a weak pilot or thermopile. If the thermopile is not heated correctly by the pilot, it cannot generate enough millivolts to open the gas valve. The same is true if the thermopile is faulty. Thermopiles consist of several junctions of which only some may go bad causing low millivolt output. Millivolt output with the thermostat off and pilot lit should be around 600 millivolt, you can check with a DC multimeter set on MV across the two wires coming from the thermopile. Remember, the thermopile has to be heated by the pilot thoroughly before you will get the full millivolt reading and the thermostat must be off. Cleaning the pilot assembly is often helpful, thermopiles are inexpensive and relatively easy to change. Of course, other problems can cause this issue as well, but the above are most common.

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I have an imperial fryer. Pilot is on but main burners don't ignite. Pilot looks normal & thermostat clicks when turned

Number 5 is your thermopile/pilot generator. It is a pilot generator that does 2 things. It holds open the valve with a safety magnet and it operates the safety valve solenoid whenever the control stat calls for heat. Overtime they get weak and will hold the pilot but not operate the valve solenoid. I would replace that pilot generator.thermopile and party on!

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1 Answer

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1 Answer

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Better check the incoming gas pressure first, it should match the requirement as stated on the nameplate. Low gas pressure will make the pilot flame small until it could not heat up the thermopile which will shut both main burner and pilot flame.

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The thermostat is acting up,The t-stat controls the heat,did you replace the pilot valve or gas valve?If there is 1 valve make sure the wires are in the correct terminals.

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your problem is the thermostat is bad.the reason it shuts down is that it trips the hi limit.the hi limit is a saftey device that shuts the system down so the oil doesnt get too hot and catch on fire.remove all the oil from the tank and you should see 2 skinny metal bulbs one is the hi limit bulb the other is the t-stat bulb,make sure they are secured to the bracket.if the t-stat bulb isnt you will also have this issue,simply reattach it.let me know.

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Sounds like the burners are dirty remove burners and run under cold water and replace propane gas burns dirty and might have blocked up burners creating a pop at the burners this will then blow out pilot light if this does not work give me a shout

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