Replacing Limit Switch On Furnace

High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high.

Replacing limit switch on furnace.

It reads the temperature of the plenum and waits until it gets appropriately warm. The limit switch energizes the fan circuit when warm air in the plenum of the furnace reaches a preset temperature. 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. Free shipping on your first order shipped by amazon.

Free shipping on your first order shipped by amazon. A limit switch is a device that s located under your furnace s supply plenum. You can change a limit switch. The rollout limit switch activated when the burner flames are not being properly drawn into the heat exchanger must be manually reset.

In this episode of repair and replace vance shows how to replace the high limit switch in a gas furnace. After reading numerous articles forums manuals i started troubleshooting and found out that limit switch don t confuse it with sail switch is not. A furnace s limit switch or fan limit switch has 3 main functions. The limit switch is a safety switch that monitors t.

4 1 out of 5 stars 16. When the furnace is warm enough upon start up to begin heating the home about 20 degrees above room temperature it will tell the fan to come on. 4 8 out of 5 stars 21. The primary limit switch which prevents the furnace from heating to unsafe temperatures is programmed to reset automatically after a malfunction.

Tell the fan when to come on. 025 29041 004 york oem furnace 3 replacement limit switch l160. More buying choices 3 10 5 new offers 47 22861 01 rheem oem furnace replacement limit switch l350. Get it as soon as sat sep 26.

B13701 54 goodman oem furnace replacement limit switch. B13701 88 goodman oem furnace replacement limit switch l170 30. When the desired temperature in the home is reached the furnace burner shuts off but the blower fan continues to operate until the temperature of the plenum falls to the lower limit switch setting. 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.