Test High Limit Switch Furnace

It reads the temperature of the plenum and waits until it gets appropriately warm.

Test high limit switch furnace.

The switch makes sure the furnace is operating safely and at its desired settings. For example if the blower motor stopped running then no air would move through the unit. The limit switch is a safety switch that monitors t. A limit switch is a device that s located under your furnace s supply plenum.

Depending on your furnace model the switch will be surrounded by a silver or white cover. How to check the furnace fan limit control switch wiring. It will be located at the top of the panel. At fan limit control settings.

The fan limit switch temperature settings shown on the dial sketch are discussed separately. It s also known as a fan limit switch or simply a limit switch. 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.

As a safety the high limit. Get it as soon as sat sep 26. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. 4 5 out of 5 stars 79.

1 16 of 171 results for furnace high limit switch amazon s choice for furnace high limit switch. In this episode of repair and replace vance shows how to replace the high limit switch in a gas furnace. Assure that the control has been installed and wired in accordance with the manufacturer s installation instructions using the following procedures. B13701 55 goodman oem furnace replacement limit switch.

Once the plenum reaches a specific temperature the limit switch sends a signal to the air handler to begin running and delivering warm air to your home. The flames would raise the temperature inside the unit and have no place to go getting hotter and hotter.