How to Light the Pilot Light on a Water Heater

When a water heater's pilot light is lit and goes out, it typically implies that a natural shift in gas pressure extinguished the flame. The most common symptom that a pilot light is out is that the water will not heat up. It's critical to understand how to ignite your water heater's pilot light so that you can restart the flame as quickly as possible to restore hot showers and ensure that no gas is unintentionally discharged into the home in the case of a faulty flame sensor.

Following your water heater's directions is critical; instructions differ depending on make and type. But, for most gas-powered water heaters, you may begin by locating the gas shut-off valve, which is generally plainly labeled on the front bottom section of the water heater. Set the knob to "Off," then wait five minutes for the gas to clear before proceeding:

1. Unlock the door/cover to get access to the pilot light. This is usually positioned underneath the gas valve; however, some water heaters have an open gap where you can view the pilot light burner.
   
2. To locate the burner inside, use a flashlight or a headlamp. It will be reached through two little gas tubes. You'll want to keep an eye on it while you're working.
   
3. Turn the gas knob to "Pilot," then push and hold it. This will start the gas flow, allowing you to spark the flame. Some water heaters feature a separate button for pilot mode, generally a red one that you push and hold.
   
4. The light that pilot while still pushing the gas pedal down. Some water heaters include a red or black igniting button, while others must be lighted manually with a long lighter.
   
5. After the flame starts, keep the gas knob or button down for a full minute. Then gently let go, making sure the light is still on.
   
6. Switch on the gas and listen for the characteristic "whump" or whooshing sounds of the main burner starting.
   
7. Reinstall the lid and take a hot shower.
   

What is a Thermocouple?A thermocouple is sometimes called a flame sensor in contemporary water heaters. If the pilot light remains out after completing the above lighting methods, you most likely have a bent, filthy, or damaged thermocouple. If it's bent and not near the burner, turn off the gas, shift it over, and try igniting the pilot again. If it doesn't work, clean it by turning off both the water heater gas valve and the main gas line near the heater. Unscrew the three nuts that hold the thermocouple and the two gas tubes to the valve. The burner is typically straightforward to remove. Vacuum out the burner ports and use a microfiber cloth and steel wool to clean the thermocouple tip. If this does not solve the issue, a new thermocouple may be purchased for less than $15 at any hardware shop.

If your water heater is causing more difficulties than you can manage, or if you're ready for a more efficient model, call your local Elizabeth Plumbing and Drain Service to restore hot water to your home. We have hundreds of qualified technicians nationwide, and hot water heaters are just one of our favorite plumbing and water appliances to repair and update!

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