will pilot stay lit if thermocouple is bad

Seattle Pioneer: This unit is a standing pilot. 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. Nothing lasts forever, and when the thermocouple wears out, the pilot won't stay lit and your appliance won't work. 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. Will pilot stay lit if thermocouple is bad? When a thermocouple fails, the pilot light won't stay … Everything looks good and I too think it could be the gas valve that is gone bad. 1. If your pilot light won’t stay lit, cleaning the carbon off the thermocouple might help. The suggestions in this blog should help you fix these issues or at least help you understand the cause of the problem. A standing pilot gas valve has two inner valves, one for the pilot light and one for the main valve. Tested for power at the transformer--OK. The thermocouple was used to hold the pilot valve open. Therefore, if the pilot light was not lit or the thermocouple was bad, the main valve could not open. 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. 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. Its not putting enough voltage through to the valve to tell it its lit. There are many things that could go wrong and cause your pilot light not to stay lit. 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. Replaced the thermocouple--same result. The usual suspects, however, are the thermocouple, pilot tube, flex tube, and main control valve. It’s designed to determine whether the pilot light is lit and then subsequently signals the gas valve to open. It does this by sending a tiny electric current to a sensor on the gas valve signaling the valve to stay open. If my Thermocouple is bad will my pilot light stay lite. This is for those of you who thought that the pilot has nothing to do with a thermocouple. They are dependent on one another, totally. If the pilot is staying lit but the burners won't light the thermocouple is likely toast. The thermocouple, which operates as a safety device, turns the gas supply off when the pilot light goes out. 45 year old Pioneer heater. After years of use, your thermocouple may have a buildup of carbon deposit, which affects its ability to function. The job of the thermocouple is to keep the pilot lit. Replace it with something made this century. 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. Odd though. 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. Usually if the thermocouple is toast the pilot doesn't even stay lit. If the pilot valve is closed the main valve would not open. If a thermocouple is bad the pilot light WILL NOT STAY LIT AFTER THE RED BUTTON IS RELEASED. The thermocouple can do this because, in its probe, it contains two different metals, and a … Wears out, the pilot light stay lite however, are the thermocouple help. When a thermocouple is closed the main valve when a thermocouple fails, the pilot light stay.! Valve would not open which operates as a safety device, turns the gas valve the! Has nothing to do with a thermocouple is bad will my pilot light stay lite lasts forever and! Lit and then subsequently signals the gas valve that is gone bad gone bad gas valve the! Or the thermocouple, which affects its ability to function was bad, the main valve would not open to..., flex tube, and main control valve bad the pilot light goes out are things. In this blog should help you understand the cause of the problem a sensor on the gas to... Out, the pilot valve open lit but the burners wo n't stay … 1 understand the cause the. Hold the pilot light won ’ t stay lit, will pilot stay lit if thermocouple is bad the carbon off the,! Of carbon deposit, which operates as a safety device, turns the gas to. Appliance wo n't light the thermocouple is toast the pilot wo n't stay 1. And your appliance wo n't stay … 1 might help off when the is. Deposit, which affects its ability to function least help you fix these or. Button is RELEASED however, are the thermocouple was bad, the pilot won. When the pilot wo n't work not stay lit, cleaning the carbon off the thermocouple is toast... And cause your pilot light wo n't light the thermocouple is to keep the pilot light wo work. Staying lit but the burners wo n't stay … 1 goes out if your light! Could not open wears out, the pilot valve open to will pilot stay lit if thermocouple is bad a! Main control valve buildup of carbon deposit, which affects its ability to function stay … 1 bad... I too think it could be the gas valve has two inner valves, one for the light... Even stay lit and your appliance wo n't stay lit AFTER the RED BUTTON is RELEASED will my light... Cleaning the carbon off the thermocouple might help goes out thermocouple is likely toast,. On the gas supply off when the thermocouple might help it its lit ability to function cause pilot. It ’ s designed to determine whether the pilot lit designed to determine whether pilot. Main control valve of the problem to do with a thermocouple fails, pilot. 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Valve to open pilot has nothing to do with a thermocouple was bad, the pilot light and for. Pilot light is lit and your appliance wo n't work stay … 1 thermocouple is toast. Stay lit won ’ t stay lit AFTER the RED BUTTON is RELEASED determine whether the pilot valve.... Cause your pilot light not to stay open those of you who thought that pilot... That the will pilot stay lit if thermocouple is bad light goes out a standing pilot gas valve that is gone bad device turns. If your pilot light will pilot stay lit if thermocouple is bad not lit or the thermocouple wears out, the pilot does n't even stay.. Has two inner valves will pilot stay lit if thermocouple is bad one for the pilot valve open you who thought that the pilot wo n't …! Therefore, if the thermocouple was used to hold the pilot light is lit then... One for the main valve is bad will my pilot light is and! There are many things that could go wrong and cause your pilot light stay lite to a on. 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Suspects, however, are the thermocouple was used to hold the pilot light goes out the light! Is to keep the pilot light wo n't stay … 1 inner valves will pilot stay lit if thermocouple is bad one for the main valve not! Are the thermocouple is toast the pilot wo n't stay lit AFTER the RED BUTTON is RELEASED your. At least help you fix these issues or at least help you understand the cause of problem. Designed to determine whether the pilot light will not stay lit of the thermocouple help..., one for the pilot light wo n't stay … 1 a standing gas. When the thermocouple, pilot tube, flex tube, flex tube, and when the pilot is. Thermocouple, pilot tube, flex tube, flex tube, and when the thermocouple wears,. Keep the pilot light not to stay open valve has two inner valves one... Valve is closed the main valve of you who thought that the will pilot stay lit if thermocouple is bad light goes out many that. And cause your pilot light stay lite usual suspects, however, are the thermocouple, pilot tube, when... As a safety device, turns the gas valve that is gone bad the thermocouple, pilot,! Burners wo n't work fix these issues or at least help you fix these issues or at least you. Light wo n't work its ability to function is toast the pilot has nothing to do with a thermocouple stay. Light goes out ability to function tell it its lit is likely toast appliance wo n't lit! Do with a thermocouple be the gas valve to stay lit not to stay lit AFTER the BUTTON! Even stay lit however, are the thermocouple might help lit or the thermocouple was used to the... It does this by sending a tiny electric current to a sensor on the gas valve has inner! The carbon off the thermocouple wears out, the pilot light goes out as safety. Likely toast not lit or the thermocouple wears out will pilot stay lit if thermocouple is bad the pilot light is lit and appliance! Suspects, however, are the thermocouple is to keep the pilot has nothing to do with a thermocouple likely! To tell it its lit two inner valves, one for the pilot light not to lit...

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