Furnace Fan And Limit Switch

Honeywell l4064b2236 combination fan and limit furnace control.

Furnace fan and limit switch. It reads the temperature of the plenum and waits until it gets appropriately warm. When the room temperature reaches the thermostat setting the furnace. It works off of temperature and also provides a high temperature safety limit this is a switch actually two switches which turns the furnace blower on and off based on the temperature of the heat exchanger. This article describes in detail the purpose operation setting installation wiring and testing of furnace combination controls also commonly called the fan limit switch on warm air heating systems.

Free shipping by amazon. A limit switch is a device that s located under your furnace s supply plenum. 4 5 out of 5 stars 164. How to diagnose and repair the furnace fan limit switch.

The fan limit switch tells the blower assembly when it is ok to blow the heated air. Once the fan limit switch has sensed that the air in the plenum is a suitable temperature usually around 20 degrees above the room temperature it engages the blower fan to distribute air. However for your own safety don t attempt to reset the switch without first consulting your furnace s instruction manual. Get it as soon as fri sep 25.

A step by step photo guide to testing combination fan limit switches on warm air furnace heating systems check this fan limit switch control if your furnace fan won t start won t turn on or won t stop runs continuously honeywell combination furnace control type l4064 explained in detail guide to troubleshooting heating system furnace. Goodman oem furnace 11 replacement combination fan limit switch. 1 16 of 342 results for furnace fan limit switch honeywell l4064b2236 combination fan and limit furnace control. Get it as soon as wed sep 30.

It s possible to reset the switch at home when necessary by following a few simple steps. Thermostat limit manual reset switch opens f 350 f 120 to 240 voltage range. More buying choices 94 99 2 used new offers nordyne 626494r fan limit switch. 25 25 product ratings l4064b 2236 honeywell l4064b 2772 l4064 a e fan limit 8 furnace control.

4 5 out of 5 stars 165. Furnace blower fan limit safety switch installation troubleshooting. A helical bi metal probe extends from the back of the. 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.

Honeywell furnace temperature fan limit switch control the fan limit control turns the fan on and off in furnace applications.