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Carrier furnace fan limit switch location.
It is usually located behind the inducer fan motor area to test it you can turn off power to furnace remove the wires from either side of the limit switch and connect the two wires you removed together.
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If the temperature inside the unit becomes to high the high limit switch will turn the gas off to the unit.
Just as it determines when the blower assembly should turn on it will also determine when it should turn off.
There should be three of them two should have a reset button on them that you can press.
Pull the panel up and toward you to free it.
If the two wires are too short to connect you use a jumper wire like a paper clip to join the terminals.
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Locate the white limit switch.
A fan limit switch consists of the following components.
Depending on your furnace model the switch will be surrounded by a silver or white cover.
Locate the rollout limit switch on the burner assembly.
Additional comfort enhancing functions on select models include ideal humidity system technology for relief from hot and sticky summer air and comfortfan technology which allows you to select furnace fan speeds from the infinity system control.
A clogged up furnace filter will block air flow into a furnace and raise the temperature inside it.
Look for a rounded component with a raised red button in the center.
One likely will not as it is an auto reset one.
To access the burner components in a downflow furnace you ll need to remove the bottom front panel.
Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms.
In carrier downflow furnace models the flame roll out switch is just above the gas burner.
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Step 4 press and hold the red reset button in the center of the rollout limit switch component.
It will be located at the top of the panel.
Be sure the filter is good.
Carrier furnaces combine quality and performance in a durable attractive and compact cabinet.
How a fan limit switch works.
The fan limit switch also has two other functions.
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