Electric Furnace Limit Switch

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.

Electric furnace limit switch. Electric furnace heating element assembly with 025 41249 000 l200 60f limit switch. Two in a upper rack 9kw. The limit switch plays an important role in every normal cycle of the furnace. Front mounting plate measures 10 75 x 3 25.

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. When the thermostat calls for heat the furnace burners ignite and begin heating the heat exchanger. It will be located at the top of the panel. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high.

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. Depending on your furnace model the switch will be surrounded by a silver or white cover. 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. This element is used in the eb17c and eb17d electric furnaces.

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 limit switch is a device that s located under your furnace s supply plenum. It reads the temperature of the plenum and waits until it gets appropriately warm. The limit switch includes a sensor in the heat exchanger to.

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. Locate the white limit switch. Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. If the blower came on at the same time as the burner it would pump cold air through the house at first.

There s apparently three coils. Also known as part number 5000 269 502 and 266186. Element is 13 deep. Function of the limit switch.