Gas Furnace Limit Switch

A limit switch also acts as a safety device for your furnace.

Gas furnace limit switch. The gas fired forced air furnace fan limit switch in the photo below is pointed to by the red arrow. It will be located at the top of the panel. 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. Trying to set my thermostat to use fan only for cooling.

The limit switch includes a sensor in the heat exchanger to. What happens if your furnace limit switch stops working properly. Depending on your furnace model the switch will be surrounded by a silver or white cover. 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.

A c electric blower motor issue. 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. Why is the furnace heating the house far past the thermostat setting. Genuine oem part.

It s also known as a fan limit switch or simply a limit switch. Over time your furnace s limit switch can develop problems. Locate the white limit switch. How should the thermostat wires be connected to my furnace.

Goodman gas furnace limit switch opening blower only runs with a c. Additionally when the plenum gets too hot the high limit switch will shut off the gas supply to the furnace burners. Benefits of fan limit switches. Goodman furnace gas valve assembly.

If the blower came on at the same time as the burner it would pump cold air through the house at first. This safety feature prevents your furnace from overheating. This is a safety feature that helps to prevent possible fires or explosions. The high temperature limit switch is an important device used in forced air furnaces powered by gas or heating oil.

The switch makes sure the furnace is operating safely and at its desired settings. Gas valve 2stage 24v 3 5 wc nat 1 2 goodman furnace gasket set. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. Goodman furnace limit switch.

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