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International Comfort Products H9MPD080J16A2 Limit Switch
A normal limit switch contains a sensor in the heat exchanger that makes the determination when the heated air is actually warm enough so that it may be pushed through the ducts and out the vents. Limit switches were created because if the air never warms up then the house will never get warm enough.
Clues critical limit switch is failing
- The whole system starts to behave differently occasionally
- The heating and cooling system refuses to kick in or run well for any significant length if time
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