Furnace Pilot Light Won T Stay Lit With New Thermocouple

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.

Furnace pilot light won t stay lit with new thermocouple.

Pilot stays lit for two weeks then goes out with the thermocouple brand new. The pilot orifice may be full of dirt. 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. Thermocouples detect pilot lights by sensing the heat they produce.

Thermocouple produces 20 mv. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple. Valve coil 121 ohms. If the pilot light is not aimed correctly simply bend the thermocouple to line it up with the pilot tube.

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. Flame on pilot light does not hit thermocouple. If your furnace s pilot light won t stay on the furnace won t work. This device generates a small electric signal to keep the gas valve open when the pilot is on.

Gas water heater pilot wont stay lit even after replacing the thermocouple. Some common causes include issues with the thermocouple and pilot tube. Cleaning out the pilot orifice means disassembling the pilot and clearing out the debris using a needle or compressed air. The thermocouple detects the pilot light via sensors.

Pilot light won t stay lit after releasing bypass button. A faulty thermocouple may arbitrarily determine that the light is off when you want it on and vice versa. If it determines that the pilot light is off it shuts down the flow of gas. Be sure everything has cooled down before realigning the thermocouple and pilot light.

You can test it with a multimeter. The pilot light is supposed to be a strong blue cone not a weak yellow flame.