Gas Furnace Fan Limit Switch

25 25 product ratings l4064b 2236 honeywell l4064b 2772 l4064 a e fan limit 8 furnace control.

Gas furnace fan limit switch.

The switch is one of the easier devices and attachments on a furnace. Over time your furnace s limit switch can develop problems. A limit switch also acts as a safety device for your furnace. The oil fired furnace fan limit switch shown in our photo below is in use on an oil fired warm air furnace where we can see about 3 4 of the silver colored dial where the fan limit switch settings are made red arrow.

It s also known as a fan limit switch or simply a limit switch. The switch makes sure the furnace is operating safely and at its desired settings. Honeywell furnace 5 combo fan limit switch l4064b3432 us stove wood coal. 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.

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. How a fan limit switch works. Free shipping by amazon. Honeywell l4064b2236 combination fan and limit furnace control.

The high temperature limit switch is an important device used in forced air furnaces powered by gas or heating oil. Additionally when the plenum gets too hot the high limit switch will shut off the gas supply to the furnace burners. A fan limit switch consists of the following components. 7975 3281 coleman oem furnace replacement fan switch f110.

In many models it also has a built in safety control for the burner to shut off at higher temperatures if the burner s inner control malfunctions. It also determines if the furnace should be shut down in the case of overheating. Get it as soon as sun oct 4. More buying choices 88 00 19 new offers hydro flame corp 31091 limit switch 190.

What happens if your furnace limit switch stops working properly. 4 4 out of 5 stars 167. If the temperature inside of the plenum gets too hot it shuts off the gas supply to your burners to prevent your furnace and heat exchanger from overheating. This safety feature prevents your furnace from overheating.

The fan limit control switch on a furnace regulates when the blower will come on or shut off. Only 11 left in stock order soon. More buying choices 10 79 4 new offers empire r1156 fan limit switch 165 degree. 37 new refurbished from 45 00.

Just as it determines when the blower assembly should turn on it will also determine when it should turn off. Some furnaces provide extra safety features by wiring two or three high limit switches in a series that check the temperature in the furnace at different points. 4 5 out of 5 stars 20.