Furnace High Limit Switch Open

Depending on your furnace model the switch will be surrounded by a silver or white cover.

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

For example if the blower motor stopped running then no air would move through the unit. More buying choices 8 80 7 new offers. The flames would raise the temperature inside the unit and have no place to go getting hotter and hotter. As a safety the high limit switch turns the gas off when the temperature becomes too high.

Locate the white limit switch. 1 16 of 368 results for furnace high limit switch b13701 55 goodman oem furnace replacement limit switch. Get it as soon as thu sep 17. Fan control limit switch.

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