Furnace High Limit Switch Open

For example if the blower motor stopped running then no air would move through the unit. More buying choices 8 80 7 new offers. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high.

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Furnace high limit switch open.

4 4 out of 5 stars 70. The flames would raise the temperature inside the unit and have no place to go getting hotter and hotter. Get it as soon as thu sep 17. Locate the white limit switch.

Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. If the furnace failure code indicates an open limit or open high temperature switch or open rollout switch it is probable that the furnace has overheated. Free shipping on your first order shipped by amazon. It will be located at the top of the panel.

Fan control limit switch. Depending on your furnace model the switch will be surrounded by a silver or white cover. As a safety the high limit switch turns the gas off when the temperature becomes too high. When the air in the plenum reaches the high limit setting on the limit switch the switch turns on and activates the blower fan circulating air through the heat exchanger on its way to the house while simultaneously pulling cool air from the house through the air returns and into the furnace.

Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace.

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