Furnace High Limit Switch Open

It will be located at the top of the panel.

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. The flames would raise the temperature inside the unit and have no place to go getting hotter and hotter. More buying choices 8 80 7 new offers. Depending on your furnace model the switch will be surrounded by a silver or white cover.

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. Fan control limit switch. 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. Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. Get it as soon as thu sep 17. For example if the blower motor stopped running then no air would move through the unit.

High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high.