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International Comfort Products N8MPL075B12B1 Limit Switch
The limit switch contains a sensor in the air handler that can determine when the heated air is actually warm enough that it can be circulated throughout the house. Limit switches exist due to the fact that if the air inside the furnace is too cool then the house will never get warm enough.
Some clues of a poorly working critical limit switch
- The whole system is beginning to ramp up but then stops occasionally
- The heating and AC system refuses to kick in or continue to run like it ought to
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