How do I know if my thermocouple is good?

Select the ohms or resistance option on your multimeter. Place one test lead on the side of the thermocouple and the other to the end that screws into the gas valve. If the thermocouple has proper continuity, a small resistance reading should be visible on the multimeter.

What is the life expectancy of a thermocouple?

We recommend replacing these thermocouples every one or two years. When we move up the temperature scale above 1200°F, and particularly into the 1500° to 1800°F range, life expectancy of the Type K thermocouple drops off. Elements at this temperature tend to show signs of deterioration in the 6-to-12-month time frame.

What do you need to replace the thermocouple in a hot water heater?

There are several ways that companies seal the burner chamber. You can have 2 or 4 screws and they can have a Phillips or an Allen head. When you are replacing the thermocouple, you may have to cut a slit in the door gasket to change out the thermocouple. When you push it back into the door, it will reseal.

How do you replace the thermocouple on a garage door?

When you are replacing the thermocouple, you may have to cut a slit in the door gasket to change out the thermocouple. When you push it back into the door, it will reseal. Be careful when removing and reinstalling the nuts to the thermocouple, burner tube and pilot tube.

How many screws do you need to replace the thermocouple?

You can have 2 or 4 screws and they can have a Phillips or an Allen head. When you are replacing the thermocouple, you may have to cut a slit in the door gasket to change out the thermocouple. When you push it back into the door, it will reseal. Be careful when removing and reinstalling the nuts to the thermocouple, burner tube and pilot tube.

How do you replace a water heater thermocouple?

Then detach the thermocouple from the burner and take it with you to the home center or hardware store to ensure you buy the right replacement. First, shut off the gas valve on the water heater and the gas valve on the gas line near the heater. Then unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.