Furnace Pilot Light Won T Stay Lit With New Thermocouple

If your furnace s pilot light won t stay on the furnace won t work.

Furnace pilot light won t stay lit with new thermocouple.

If it determines that the pilot light is off it shuts down the flow of gas. If the pilot lights but won t stay lit the thermocouple is probably bad. This device generates a small electric signal to keep the gas valve open when the pilot is on. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple.

Thermocouple produces 20 mv. Flame on pilot light does not hit thermocouple. 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. 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.

While this is an excellent safety feature a faulty thermocouple may decide arbitrarily that your pilot light is off when you want it on shutting down your pilot light and your furnace. Some common causes include issues with the thermocouple and pilot tube. Thermocouples detect pilot lights by sensing the heat they produce. The thermocouple detects the pilot light via sensors.

The pilot light is supposed to be a strong blue cone not a weak yellow flame. Pilot stays lit for two weeks then goes out with the thermocouple brand new. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. Be sure everything has cooled down before realigning the thermocouple and pilot light.

If the pilot light is not aimed correctly simply bend the thermocouple to line it up with the pilot tube. A weaker flame won t envelop the thermocouple properly. Gas water heater pilot wont stay lit even after replacing the thermocouple. 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. You can test it with a multimeter.