How to install a gas shut off valve in a furnace - Bob Vila.
Most modern gas appliances have a gas shut off valve.If the pilot light flame does not come on, or if it is extinguished, they are designed to close the gas supply.Sometimes you will have to replace the gas shut off valve.
If you can't light your furnace or pilot light flame, then your gas shut-off valve has failed.If you want to replace the thermocouple, you will need to get a new device that can turn off the gas in an emergency.Follow the steps to replace the gas shut off valve.
It is not always easy to find a replacement thermocouple.The parts of the ignition need to be connected together.The components cannot work if they don't match up.The thermocouple may not be able to detect changes in the pilot light flame if you buy an unsuitable replacement part.The owner's manual can be used to locate the part number of your thermocouple.
The electricity and gas supplies should be turned off.Allow it to cool down.While you wait for the furnace to become cool enough to touch, you might want to do another task.
Remove the bolt from the access panel and place it on the side.You should be able to see inside the furnace.The pilot light and switch can be found on one of the furnace burners.
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