Electric Furnace Limit Switch

So to put it simply the limit switch tells the furnace fan when to turn on and when to shut off and it tells the furnace to shut down if it is overheating.

Electric furnace limit switch.

This element is used in the eb17c and eb17d electric furnaces. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. 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. Function of the limit switch.

High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high. Out of shear desperation i ordered a supco l180 20 limit switch. Front mounting plate measures 10 75 x 3 25. The limit switch plays an important role in every normal cycle of the furnace.

Two in a upper rack 9kw. 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. It looks like it will fit. There s apparently three coils.

The limit switch includes a sensor in the heat exchanger to. The furnace model tag has been painted over and the limit switch has blew a terminal off and i m not able to cross reference the limit switch. When the thermostat calls for heat the furnace burners ignite and begin heating the heat exchanger. It reads the temperature of the plenum and waits until it gets appropriately warm.

It will be located at the top of the panel. Electric furnace heating element assembly with 025 41249 000 l200 60f limit switch. A limit switch is a device that s located under your furnace s supply plenum. Initially the air above the heat exchanger in the supply plenum is not warm enough to blow into the house so the limit switch keeps the blower off.

If the blower came on at the same time as the burner it would pump cold air through the house at first. Element is 13 deep. Locate the white limit switch. How to check limit switches using your voltmeter.