Honeywell furnace 5 combo fan limit switch l4064b3432 us stove wood coal.
Furnace fan temp switch.
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The fan limit control switch on a furnace regulates when the blower will come on or shut off.
Setting the middle arm at this temperature ensures that the fan will switch on at the correct time when the furnace warms ups.
When the room temperature reaches the thermostat setting the furnace will turn off.
Honeywell furnace 11 combo fan limit switch l4064a3046.
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The switch is one of the easier devices and attachments on a furnace.
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.
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.
A typical limit switch consists of a long temperature sensor probe attached to a mounting plate.
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Honeywell furnace temperature fan limit switch control the fan limit control turns the fan on and off in furnace applications.
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F 150 degrees f 14 10 125 25 25 voltage range 120 to 240 150 degrees f 170 degrees f brands.
F 170 degrees f fan off temp.
A helical bi metal probe extends from the back of the.
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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.
The probe extends through the wall of the furnace housing and the plate fastens to the outside of the furnace.
Provided that the fan switch is in auto position when the thermostat has been satisfied and turns off the oil or gas burner at the furnace the fan limit switch will cause the blower or fan unit to continue to operate just until the temperature at the supply plenum has reached or dropped below the fan off lower limit on the switch the blue.