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Why do the flames keep going out - Heating & Cooling

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If you are talking about a device with a pilot light, then it may be that the thermocouple has gone bad. The thermocouple is positioned right in the flame and provides an electrical signal that indicates when it is hot. If the thermocouple is not providing the correct voltage, then the rest of the system assumes the pilot light has gone out and shuts off the gas to avoid an explosive situation. The thermocouple itself is pretty inexpensive, so just swapping it for a new one is a reasonable thing to try.

Posted on Dec 01, 2014

  • mechaero Dec 01, 2014

    If you are talking about a device with a pilot light, then it may be that the thermocouple has gone bad. The thermocouple is positioned right in the flame and provides an electrical signal that indicates when it is hot. If the thermocouple is not providing the correct voltage, then the rest of the system assumes the pilot light has gone out and shuts off the gas to avoid an explosive situation. The thermocouple itself is pretty inexpensive, so just swapping it for a new one is a reasonable thing to try.

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If keeping the thermocouple bypass pressed keeps the gas flowing to the pilot but the flame goes out when it is released in spite of keeping the flame going the customary amount of time, then either the flame isn't powerful enough to reach and heat the thermocouple bulb, the pilot flame or the bulb is out of alignment or the thermocouple is faulty.

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