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How do I replace the thermocouple on a gas water heater?

Daphne Dooley ∙

Lvl 10

∙ 2mo ago

Updated: 2/18/2025

To replace the thermocouple on a gas water heater, first turn off the gas supply and water heater. Locate the thermocouple near the pilot light and unscrew it from the control valve. Install the new thermocouple by screwing it into place and reassemble the water heater. Finally, turn the gas supply and water heater back on to test the new thermocouple.

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Q: How do I replace the thermocouple on a gas water heater?

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Related Questions

What is the process for replacing a Honeywell water heater thermocouple?

To replace a Honeywell water heater thermocouple, first turn off the gas supply and water heater. Remove the access panel and locate the thermocouple. Disconnect the old thermocouple and install the new one in the same position. Reassemble the access panel and turn on the gas supply and water heater to test the new thermocouple.

How do I troubleshoot and replace a faulty thermocouple in a state select water heater?

To troubleshoot and replace a faulty thermocouple in a State Select water heater, follow these steps: Turn off the gas supply to the water heater. Locate the thermocouple near the pilot light assembly. Disconnect the thermocouple from the control valve. Remove the old thermocouple from the pilot assembly. Install the new thermocouple in the same position. Reconnect the thermocouple to the control valve. Turn on the gas supply and relight the pilot light. Test the water heater to ensure it is functioning properly. If you encounter any difficulties or are unsure about any step, consult a professional plumber for assistance.

Why won't the water heater pilot light stay on?

The water heater pilot light may not stay on due to issues with the thermocouple, gas supply, or a dirty pilot light. It is important to check and potentially replace the thermocouple, ensure proper gas flow, and clean the pilot light to resolve the issue.

Where is the pilot located on the gas water heater?

Right below the thermocouple if applicable

Hot water heater pilot wont light?

THERMOCOUPLE or defective gas valve

What is the function of a thermocouple in a gas heater?

A thermocouple in a gas heater is a safety device that detects if the pilot light is on. If the pilot light goes out, the thermocouple shuts off the gas supply to prevent a dangerous gas leak.

How do you change the thermocouple on a reliant 606 water heater?

To change the thermocouple on a Reliant 606 water heater, you will first need to turn off the gas supply and water heater. Remove the access panel, locate the thermocouple, unscrew it from the control valve, and disconnect it from the pilot assembly. Install the new thermocouple by reversing these steps, making sure it is properly positioned and secured.

How do you operate water heater is it gas or electirc or both?

It is one or the other. The thermocouple on a gas heater generates a very small current that keeps the gas valve open. A few micro volts. The thermocouple is the small tube that sits in the flame of the pilot light.

Why won't my gas water heater stay lit?

A gas water heater may not stay lit due to issues with the thermocouple, gas supply, or ventilation. It is important to have a professional inspect and repair the heater to ensure safe and efficient operation.

How do you clean thermocouple on hot water tank?

You do NOT clean a thermocouple. They are really inexpensive and when they are giving problems have a LMP / or Gas fitter replace it

Why does the water heater pilot go out?

The water heater pilot can go out due to issues such as a faulty thermocouple, a dirty pilot light, or a lack of gas supply.

How do you replace a thermocouple on a hot water heater?

To replace a thermocouple on a hot water heater, start by turning off the gas supply and allowing the unit to cool. Remove the old thermocouple by unscrewing it from the gas control valve and pilot assembly. Insert the new thermocouple in the same position, tighten it securely, and relight the pilot light before turning the gas supply back on.

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