Replacing Limit Switch On Furnace

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.

Replacing limit switch on furnace.

4 6 out of 5 stars 46. Free shipping on your first order shipped by amazon. After reading numerous articles forums manuals i started troubleshooting and found out that limit switch don t confuse it with sail switch is not. 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.

The limit switch energizes the fan circuit when warm air in the plenum of the furnace reaches a preset temperature. In this episode of repair and replace vance shows how to replace the high limit switch in a gas furnace. 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. A furnace s limit switch or fan limit switch has 3 main functions. It reads the temperature of the plenum and waits until it gets appropriately warm. 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.

More buying choices 3 10 5 new offers 47 22861 01 rheem oem furnace replacement limit switch l350. High limit switch a high limit control switch will turn off the gas to a furnace if the temperature becomes too high. 025 29041 004 york oem furnace 3 replacement limit switch l160. 4 1 out of 5 stars 16.

Diy with rv replacing limit switch atwood 8535 so at some point of course that was a coldest part of our trip in yellowstone furnace atwood 8535 iii started blowing cold air only. B13701 54 goodman oem furnace replacement limit switch. The limit switch is a safety switch that monitors t. 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.

Tell the fan when to come on. Get it as soon as thu sep 24. The rollout limit switch activated when the burner flames are not being properly drawn into the heat exchanger must be manually reset. B13701 88 goodman oem furnace replacement limit switch l170 30.