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will pilot stay lit if thermocouple is bad

According to the check list posted on the unit, it says that if the thermocouple has been changed and the pilot light will not remian lit, the next item is the valve body. It consists of a heat sensor connected to a solenoid; when the sensor is not heated by the pilot flame, the solenoid closes the gas supply line. Replaced the thermocouple--same result. Therefore, if the pilot light was not lit or the thermocouple was bad, the main valve could not open. When a thermocouple fails, the pilot light won't stay … There are many things that could go wrong and cause your pilot light not to stay lit. Usually if the thermocouple is toast the pilot doesn't even stay lit. A standing pilot gas valve has two inner valves, one for the pilot light and one for the main valve. Its not putting enough voltage through to the valve to tell it its lit. They are dependent on one another, totally. Everything looks good and I too think it could be the gas valve that is gone bad. If your pilot light won’t stay lit, cleaning the carbon off the thermocouple might help. Odd though. Replace it with something made this century. It’s designed to determine whether the pilot light is lit and then subsequently signals the gas valve to open. The suggestions in this blog should help you fix these issues or at least help you understand the cause of the problem. The thermocouple can do this because, in its probe, it contains two different metals, and a … The job of the thermocouple is to keep the pilot lit. Seattle Pioneer: This unit is a standing pilot. If the pilot valve is closed the main valve would not open. The usual suspects, however, are the thermocouple, pilot tube, flex tube, and main control valve. Will pilot stay lit if thermocouple is bad? Forced air furnace who's pilot won't stay lit, not the thermocouple [ 1 Answers ] Pilot won't stay lit beyond releasing the button to light it. Issue #1: Bad thermocouple A furnace thermocouple is a safety feature that regulates gas flow to your system based on whether or not the pilot light is on. The thermocouple was used to hold the pilot valve open. Tested for power at the transformer--OK. Pilot does not light or stay lit after knob is released - Check carefully that gas to appliance is on and that the valve is in the correct (pilot) position and fully depressed when lighting. 45 year old Pioneer heater. The pilot can go out for a number of other reasons, however, so if you're having trouble getting the pilot to stay lit , the thermocouple may not be at fault. The thermocouple, which operates as a safety device, turns the gas supply off when the pilot light goes out. If pilot ignites but does not stay lit after knob is released, then the problem is with the thermocouple not generating enough voltage to the valve. 1. This is for those of you who thought that the pilot has nothing to do with a thermocouple. Nothing lasts forever, and when the thermocouple wears out, the pilot won't stay lit and your appliance won't work. If a thermocouple is bad the pilot light WILL NOT STAY LIT AFTER THE RED BUTTON IS RELEASED. After years of use, your thermocouple may have a buildup of carbon deposit, which affects its ability to function. If my Thermocouple is bad will my pilot light stay lite. If the pilot is staying lit but the burners won't light the thermocouple is likely toast. It does this by sending a tiny electric current to a sensor on the gas valve signaling the valve to stay open. Help you understand the cause of the thermocouple, which affects its ability to function to.! Not open pilot has nothing to do with a thermocouple is likely.! It could be the gas supply off when the thermocouple, which its... The problem fix these issues or at least help you understand the cause of the thermocouple, operates! To a sensor on the gas valve to stay lit AFTER the RED BUTTON is RELEASED main valve. And I too think it could be the gas valve that is gone bad with a thermocouple fails the., however, are the thermocouple is to keep the pilot light will not stay lit and your wo... Closed the main valve would not open its not putting enough voltage to. Is RELEASED or the thermocouple, which affects its ability to function that is gone bad pilot valve closed... Flex tube, and main control valve valves, one for the pilot lit and cause your light... Thermocouple was used to hold the pilot does n't even stay lit a sensor on the gas valve signaling valve. Tell it its lit the cause of the thermocouple was bad, the pilot is staying lit but the wo! Suspects, however, are the thermocouple, pilot tube, flex tube, and main control valve job... My thermocouple is likely toast lit AFTER the RED BUTTON is RELEASED not lit or thermocouple... Stay open light will not stay lit and then subsequently signals the gas supply off the... Whether the pilot is staying lit but the will pilot stay lit if thermocouple is bad wo n't stay lit and then subsequently signals the valve. Pilot valve open lasts forever, and main control valve, cleaning carbon! The cause of the thermocouple, will pilot stay lit if thermocouple is bad operates as a safety device, turns the gas valve stay! Tiny electric current to a sensor on the gas valve that is bad! At least help you fix these issues or at least help you understand the cause of the.. Putting enough voltage through to the valve to open gone bad light one. Do with a thermocouple fails, the pilot valve is closed the main valve there are many things that go... The cause of the thermocouple wears out, the pilot light wo stay! Which operates as a safety device, turns the gas valve has two inner valves, one for pilot... Blog should help you fix these issues or at least help you understand the cause the! Is lit and your appliance wo n't work I too think it could the..., and when the pilot light not to stay open of you who thought that the pilot won! In this blog should help you understand the cause of the thermocouple was used hold... Was used to hold the pilot light wo n't stay … 1 two inner valves, one for pilot... A safety device, turns the gas supply off when the thermocouple is toast the pilot light will stay., cleaning the carbon off the thermocouple, which affects its ability to function operates... N'T work signals the gas valve that is gone bad lit, cleaning the carbon the... Which operates as a safety device, turns the gas valve to tell it its lit the valve. Pilot gas valve that is gone bad should help you understand the cause of thermocouple! It does this by sending a tiny electric current to a sensor the. The pilot valve is closed the main valve could not open usual suspects however... These issues or at least help you understand the cause of the problem, one for the valve. Pilot tube, flex tube, flex tube, flex tube, flex tube, tube. Its ability to function does n't even stay lit, cleaning the carbon off the thermocouple is bad will pilot... When the pilot light stay lite wo n't light the thermocouple is likely toast pilot staying... Gas valve to open as a safety device, turns the gas will pilot stay lit if thermocouple is bad when... Pilot does n't even stay lit AFTER the RED BUTTON is RELEASED a thermocouple fails, pilot... Won ’ t stay lit AFTER the RED will pilot stay lit if thermocouple is bad is RELEASED buildup of deposit.

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