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International Comfort Products GNE050B12A1 Limit Switch
One big reason why limit switches are designed that way is because if the air never warms up then you will never get hot air through the ducts. A normal limit switch contains a sensor in the air handler that can determine if and when the air is actually warm enough for the air to begin normal home circulation.
Key symptoms of a failing critical limit switch
- The HVAC system begins to act differently repeatedly
- The heating and AC system will not begin the ignition sequence or run well longer than a minute
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