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International Comfort Products PGAD24D1K5 Limit Switch
A normal limit switch has a sensor in the heat exchanger that makes the determination if and when the air is warmed to a point for the main blower to kick in and circulate the air. This is important because if the warmed air is too cool then you will never get hot air through the ducts.
Key symptoms to watch for in a bad critical limit switch
- The whole system is starting to initiate and then stops from time to time
- The heating and AC system will not begin or run well like it ought to
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