Gas Furnace Limit Switch

Genuine oem part 20162903 rc item 2645576.

Gas furnace limit switch.

Locate the white limit switch. Genuine oem part. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. How should the thermostat wires be connected to my furnace.

If the temperature inside of the plenum gets too hot it shuts off the gas supply to your burners to prevent your furnace and heat exchanger from overheating. Some furnaces provide extra safety features by wiring two or three high limit switches in a series that check the temperature in the furnace at different points. Goodman furnace limit switch. It s also known as a fan limit switch or simply a limit switch.

This safety feature prevents your furnace from overheating. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high. Gas valve 2stage 24v 3 5 wc nat 1 2 goodman furnace gasket set. It will be located at the top of the panel.

A limit switch also acts as a safety device for your furnace. The high temperature limit switch is an important device used in forced air furnaces powered by gas or heating oil. A furnace has two switches called a fan limit switch and a high limit switch these switches can be separate or in one package called a combination switch. The limit switch includes a sensor in the heat exchanger to.

Additionally when the plenum gets too hot the high limit switch will shut off the gas supply to the furnace burners. Genuine oem part 0151f00000ps rc item 3320750. Goodman gas furnace limit switch opening blower only runs with a c. Depending on your furnace model the switch will be surrounded by a silver or white cover.

In the event that the furnace fan breaks down or malfunctions but the burner continues burning and increasing the temperature within the furnace the fan limit switch will cut the power to the gas valve. Trying to set my thermostat to use fan only for cooling. This is a safety feature that helps to prevent possible fires or explosions. If the blower came on at the same time as the burner it would pump cold air through the house at first.

Benefits of fan limit switches. The switch makes sure the furnace is operating safely and at its desired settings. A c electric blower motor issue. Goodman furnace gas valve assembly.

Over time your furnace s limit switch can develop problems. The gas fired forced air furnace fan limit switch in the photo below is pointed to by the red arrow.