Fan Limit Control Switch Settings

A control which turns the blower fan on or off depending on the air temperature within the furnace.

Fan limit control switch settings.

Furnace fan off setting the furnace combination fan and limit control fan off setting blue arrow in our photo at. A temperature sensor within the furnace. Your fan limit controls sense the temperature change and activate the blower. Look for the fan limit control switch encased in a small rectangular box.

The fan limit control includes these key features a manually operated blower fan on off switch on some not all fan limit controls a temperature sensor in the furnace either a probe with bimetallic spring or a snap disc type temperature sensor. A fan limit switch consists of the following components. Furnace fan on setting when an adequate warm temperature has been reached inside. Open up the access panel on the furnace.

An on off switch for the blower fan. Fan limit control w 125 f on 100 f off fan on 65 f 215 f 8 insert l4064b2236 fan limit control w 125 f on 100 f off fan on 65 f 215 f 8 insert. This one gets more specific about the method of holding the dial while adjusting the honeywell fan and limit combination used on gas furnaces up until about. A high limit setting which turns off the heat source or burner.

The fan limit controls in your furnace or forced air heating system are the components that determine when the furnace blower assembly should switch on and off. Slide the cover off the control switch. It should be located near the top of. How to set a fan limit control switch step 1.

How to choose the proper settings for a warm air furnace combination fan limit control switch 1. When the thermostat calls for heat the burner jumps into action starting a heat exchange.