Locate the white limit switch.
Carrier furnace fan limit switch location.
Things to check first.
Pull the panel up and toward you to free it.
One likely will not as it is an auto reset one.
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Locate the rollout limit switch on the burner assembly.
Carrier furnaces combine quality and performance in a durable attractive and compact cabinet.
If the temperature inside the unit becomes to high the high limit switch will turn the gas off to the unit.
Depending on your furnace model the switch will be surrounded by a silver or white cover.
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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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It also determines if the furnace should be shut down in the case of overheating.
Be sure the filter is good.
In carrier downflow furnace models the flame roll out switch is just above the gas burner.
The fan limit switch also has two other functions.
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.
Honeywell l4064b2236 combination fan and limit furnace control.
There should be three of them two should have a reset button on them that you can press.
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A clogged up furnace filter will block air flow into a furnace and raise the temperature inside it.
How a fan limit switch works.
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Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms.
Just as it determines when the blower assembly should turn on it will also determine when it should turn off.
Step 4 press and hold the red reset button in the center of the rollout limit switch component.
To access the burner components in a downflow furnace you ll need to remove the bottom front panel.
The limit switches are around the burner housing.
Look for a rounded component with a raised red button in the center.