Furnace Pilot Light Won T Stay Lit With New Thermocouple

You can test it with a multimeter.

Furnace pilot light won t stay lit with new thermocouple.

Pilot stays lit for two weeks then goes out with the thermocouple brand new. If your furnace s pilot light won t stay on the furnace won t work. Valve coil 121 ohms. When your pilot light will not stay lit for more than a few moments turn the pilot light on and be sure it is aimed at the thermocouple.

Some common causes include issues with the thermocouple and pilot tube. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple. If the pilot light is not aimed correctly simply bend the thermocouple to line it up with the pilot tube. This device generates a small electric signal to keep the gas valve open when the pilot is on.

If it determines that the pilot light is off it shuts down the flow of gas. The pilot orifice may be full of dirt. Cleaning out the pilot orifice means disassembling the pilot and clearing out the debris using a needle or compressed air. A weaker flame won t envelop the thermocouple properly.

Thermocouple produces 20 mv. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. Gas water heater pilot wont stay lit even after replacing the thermocouple. Be sure everything has cooled down before realigning the thermocouple and pilot light.

If the pilot lights but won t stay lit the thermocouple is probably bad. The pilot light is supposed to be a strong blue cone not a weak yellow flame. When my pilot light wouldn t stay lit on my furnace i asked a few plumber buddies about the symptoms and they both said it was the thermo couple. Pilot light won t stay lit after releasing bypass button.

Thermocouples detect pilot lights by sensing the heat they produce. Make sure that the thermocouple is within the flame of the pilot and then hold the pilot button in for at least one minute maybe two in order for the thermocouple to be warmed up.