Furnace Blower Motor Switch

This assembly is designed for 40 60 80 and 100 thousand btu model furnaces.

Furnace blower motor switch.

We smelled a burnt plastic smell in the house and my wife mentioned that the. Furnace ac blower motor replacement or how to replace your furnace blower motor. Your furnace s btu rating may be listed on the model number tag. You can also determine the rating from your model number 8212 the 3 digit number preceding the hyphen indicates the btu rating.

When the furnace heat exchanger heats up the bimetal twists causing the round dial shown in the picture to turn. To restore the furnace to normal operation you must reset the switch on the blower motor. 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. This control also provides a safety limit that turns off the burner or furnace if temperatures at the furnace are too high.

Fan limit switches are used on all types of building heating furnaces. Please visit my amazon store front for awesome hvac tools at a affordable price delivered right to your home every tool in my hvac tool of th. Based on where the manual selection switch is set when it reaches the manual setting contacts inside the switch close. 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.

Most types of residential furnaces feature an internal component known as a blower switch that is used to shut down the fan motor in the event that the appliance overheats the motor malfunctions or the furnace filter becomes clogged. Then the furnace blower motor turns on. How to wire a furnace or ac blower motor.