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Why does your gas hot water heater pilot keep going out?

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  • This is usually caused by a bad thermocouple. The thermocouple looks like a thick, solid copper wire screwed into the gas valve on the water heater. The pilot flame heats the tip of the thermocouple, causing it to generate a minute electrical current at low voltage, which provides power to an electric valve that controls the flow of gas to the main burner. If you attempt to relight the pilot burner and it refuses to stay lit when you release the button on the gas valve a minute, or so, after the flame has been lit, the thermocouple is the most likely cause. Replacement thermocouples are readily available from most hardware stores and can be replaced by the homeowner, using simple tools, by following the instructions on the package.
  • Another cause of the problem could be a lack of air to the combustion chamber. Newer water heaters require more volume of air due to the addition of a heat sensitive diode to the thermocouple. Not enough air flowing through the combustion chamber to carry the heat up through the flue causes heat build up, which kills the thermocouple. On my water heater, I could light the pilot and the water heater would burn for 20 minutes or so and shut off. The fix included routing the flue straight through the roof and opening floor to allow more air into the water heater compartment.
  • Another possible culprit may be water-heater vent height above the roof. In some situations this may periodically result in a downdraft that could cause the pilot light to go out. If this is the case adding to the vent height may help. Note: building code states that the B vent required height is based on the roof pitch but it must be 2 feet higher than any portion of the building within 8 feet of the vent.
  • Make sure the vent cap isn't missing or rusted through on the roof, it will cause drafts and wind to blow out the pilot.
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Why does your pilot light keeps going out on your gas heater?

The pilot could be dirty and may be too weak to heat the thermocouple properly. Most of the time it comes down to replacing the thermocouple. ANS 2 The thermocouple costs

How do keep the pilot on in my gas heater?

Depress pilot valve, hold in while lighting, hold in for 2 minutes while lit. Continue to hold pilot valve in while rotating the gas control to the "on" position. If the pilot

How do you lite a gas water heater pilot?

By reading the directions provided with the heater The older types of water heaters have a gas controller that has on top there is a button called pilot and you must turn th

Why does your gas hot water heater pilot keep going out on very hot days only?

"Gas hot water heater"? Why would you want to heat water if it's already hot? Down draft (spillage) Defective thermocouple Dirty fuel tube supply Improper venting Excessive hu

Should your hot water heater be on pilot or on?

"Pilot" is only when initially igniting your water heater. Some manufacturers state to leave it on "Pilot" for so many minutes before turning to on but this is only temporary.

Why does the pilot light keep going out on your hot water heater?

The thermocouple is going bad. The thermocouple is the small tube that sits in the flame from the pilot light and goes back to the gas valve. They are easy to replace and cost

How do you light the pilot on a gas water heater?

You turn the regulator to OFF, wait 2 minutes, then turn it to 'Pilot' and depress it. Have a long match as is used for BBQ's , reach in and hold match where flame shield is a