Then unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.
Hot water heater thermocouple replacement.
A thermocouple thermopile or thermostat.
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Detach the thermocouple from the burner.
The thermocouple is usually attached to the pilot gas supply tube with one or more clips that snap into place.
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Perhaps you need a new pilot or igniter.
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Once the pilot supply tube burner supply tube and thermocouple are disconnected from the gas control valve see above simply lift and remove the burner assembly from the bottom of the water heater.
The end of the thermocouple is inserted into the pilot assembly and can simply be pulled out.
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It also signals the valve to close when the pilot.
Take the detached thermocouple with you to the home center or hardware store and buy a new one.
Re light the pilot according to the instructions printed on it and set the temperature control valve to the desired temperature.
The thermocouple is a heat sensitive device that sends an electrical signal to the gas valve to keep the pilot valve open when the pilot is on.
Apply soapy water around the three fittings looking for bubbles that indicate a gas leak.
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First shut off the gas valve on the water heater and the gas valve on the gas line near the heater.
Check out the video below which shows you how to replace your thermocouple.
Turn the gas on leading to the water heater.
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Remove burner assembly.
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