Gas Furnace Limit Switch

It s also known as a fan limit switch or simply a limit switch.

Gas furnace limit switch. 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. Goodman furnace gas valve assembly. Goodman gas furnace limit switch opening blower only runs with a c. If the blower came on at the same time as the burner it would pump cold air through the house at first.

Genuine oem part 0151f00000ps rc item 3320750. Genuine oem part. The high temperature limit switch is an important device used in forced air furnaces powered by gas or heating oil. Gas valve 2stage 24v 3 5 wc nat 1 2 goodman furnace gasket set.

How should the thermostat wires be connected to my furnace. Genuine oem part 20162903 rc item 2645576. The oil fired furnace fan limit switch shown in our photo below is in use on an oil fired warm air furnace where we can see about 3 4 of the silver colored dial where the fan limit switch settings are made red arrow. This safety feature prevents your furnace from overheating.

This is a safety feature that helps to prevent possible fires or explosions. The switch makes sure the furnace is operating safely and at its desired settings. Over time your furnace s limit switch can develop problems. 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.

Goodman furnace limit switch. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high. Additionally when the plenum gets too hot the high limit switch will shut off the gas supply to the furnace burners. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms.

A limit switch also acts as a safety device for your furnace. A c electric blower motor issue. It will be located at the top of the panel. Trying to set my thermostat to use fan only for cooling.

The limit switch includes a sensor in the heat exchanger to. 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. Depending on your furnace model the switch will be surrounded by a silver or white cover. Benefits of fan limit switches.

What happens if your furnace limit switch stops working properly. Locate the white limit switch.