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Heat the Thermocouple — Hold the Control Knob

Beginner45 mins

Part of project

How to Safely Relight Your Gas Water Heater Pilot Light · Step 7 of 10

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Once the pilot flame is lit, you must continue to hold the red gas button down for an additional 30 to 60 seconds. This crucial step allows the heat from the pilot flame to warm up the thermocouple sensor. Once the thermocouple is hot enough, it will generate a small electrical current that signals to the gas valve that it is safe to remain open. After the 30-60 second period, slowly release your finger from the button. The pilot flame should remain lit on its own.

Goal: Keep the pilot lit to heat the thermocouple, enabling continuous gas flow

  • If the pilot light goes out after you release the button, the thermocouple may be faulty or dirty and might need to be cleaned or replaced.
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FAQs

What should I do if I smell gas strongly before or during the relighting process?

This is a critical safety concern. If you smell gas, immediately stop, evacuate everyone from the house, and call your gas company's emergency line from outside. Do not attempt to relight the pilot, use any electrical switches, or operate anything that could create a spark.

Can I use a standard match or a short lighter instead of the recommended long flexible lighter?

While it might seem possible, it's highly recommended to use a long, flexible lighter like the Bernzomatic LTR220. This keeps your hands safely away from the burner area and any potential flare-ups, significantly reducing the risk of burns. Prioritize safety with the right tools.

My pilot light lights up, but goes out as soon as I release the gas control knob. What could be wrong?

This usually indicates a faulty thermocouple, which is a safety device that senses the pilot flame. Try holding the knob in longer (up to 60 seconds) to ensure the thermocouple heats sufficiently. If it still won't stay lit, the thermocouple likely needs replacement, which is a slightly more advanced DIY task or a job for a professional.

How long does this project typically take for a beginner, and is it truly considered 'beginner' difficulty?

For a true beginner, this project generally takes about 30-45 minutes, especially if you take your time with all the safety steps. It is considered beginner-friendly because it primarily involves following clear instructions and basic tool use, with the main challenge being careful adherence to safety protocols.

Transcript
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for the gas to dissipate before repeating the process. Once the pilot is lit, continue holding the red button down for 30 to 60 seconds. This allows the thermocouple to heat up and gas to flow uninterrupted. Next, slowly release your finger from the button. The pilot should stay lit if the thermocouple is working properly. Now before you turn the gas valve to the on position, make sure to reinsert the inner cover

Auto-generated transcript. May contain errors.