How to replace the thermocouple on a standing pilot water heater.
Hot water heater thermocouple replacement.
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Re light the pilot according to the instructions printed on it and set the temperature control valve to the desired temperature.
Detach the thermocouple from the burner.
The end of the thermocouple is inserted into the pilot assembly and can simply be pulled out.
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Turn the gas on leading to the water heater.
Remove burner assembly.
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.
Perhaps you need a new pilot or igniter.
Check out the video below which shows you how to replace your thermocouple.
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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.
It also signals the valve to close when the pilot.
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A thermocouple thermopile or thermostat.
Apply soapy water around the three fittings looking for bubbles that indicate a gas leak.
The burner typically sits loosely or under clips in the burning chamber and just slides out.
Take the detached thermocouple with you to the home center or hardware store and buy a new one.