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International Comfort Products PGF048K080F Limit Switch
A normal limit switch contains a sensor in the air handler that determines when the heated air is warmed to a point for the air to begin normal home circulation. Limit switches are built because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts.
Important signs limit switch will eventually need to be replaced
- The whole system starts to run inconsistently more than once
- The heating and cooling system will not even start or run well even though max temp has not been reached
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