Electric Furnace Fan Limit Switch

The fan limit switch on a heating furnace controls when the furnace blower fan turns on and off.

Electric furnace fan limit switch. However for your own safety don t attempt to reset the switch without first consulting your furnace s instruction manual. Definition of a fan limit switch a fan limit switch is a component of a furnace system that determines when the furnace blower assembly for hot air turns on and off. This is used so that cold air is not blown into a house waiting for the gas flames to heat up enough before the blower turns on. 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.

Only 11 left in stock order soon. Fan control limit switch the fan switch reads the temperature inside a furnace and once the temperature becomes warm enough turns the blower motor on sending warm air into a home. Essentially this means that it determines when the hot air should be blown through your ventilation system. More buying choices 10 79 4 new offers empire r1156 fan limit switch 165 degree.

Fan limit switches are used on all types of building heating furnaces. Honeywell furnace 5 combo fan limit switch l4064b3432 us stove wood coal. The fan limit switch also has two other functions. This control also provides a safety limit that turns off the burner or furnace if temperatures at the furnace are too high.

4 3 out of 5 stars 39. Free shipping by amazon. The switch is located under the supply plenum and it reads the plenum s temperature. The fan control limit switch is what communicates this message from the furnace s supply plenum to its air handler.

It s possible to reset the switch at home when necessary by following a few simple steps. 4 5 out of 5 stars 20. 4 4 out of 5 stars 167. It reads the temperature of the plenum and waits until it gets appropriately warm.

More buying choices 88 00 19 new offers hydro flame corp 31091 limit switch 190. 7975 3281 coleman oem furnace replacement fan switch f110. 25 25 product ratings l4064b 2236 honeywell l4064b 2772 l4064 a e fan limit 8 furnace control. When the plenum reaches the appropriate temperature the limit switch will send a signal to the air handler.

The function of your furnace limit switch is to tell the fan when to turn off and on depending on the temperature in the home. A limit switch is a device that s located under your furnace s supply plenum.