Furnace High Limit Switch Open

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.

Furnace high limit switch open.

Fan control limit switch. Depending on your furnace model the switch will be surrounded by a silver or white cover. More buying choices 8 80 7 new offers. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms.

4 4 out of 5 stars 70. Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. As a safety the high limit switch turns the gas off when the temperature becomes too high. 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. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high. Free shipping on your first order shipped by amazon. It will be located at the top of the panel.

Locate the white limit switch.