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International Comfort Products H9MPD100J20A1 Limit Switch
This is important due to the fact that if the air never warms up inside the exchanger the you will lose heat in the ducts and the vents will just blow cool air. A normal limit switch contains a sensor in the air handler that decides when the heated air is actually warm enough for the blower to be activated.
Major symptoms of an unhealthy main limit switch
- Your International Comfort Products system will not start or run well even though max temp has not been reached
- The HVAC system begins to runs spotty occasionally
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