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Carrier 48JZ036060300 Limit Switch
One big reason why limit switches are designed that way is because if the warmed air is too cool the you will lose all the heat as the air flows through the ducts. The limit switch has a sensor in the heating area that decides if and when the air is warmed to a point for the air to begin normal home circulation.
Signs of a barely functioning limit switch
- The HVAC system refuses to start or will not stay running longer that five minutes
- The whole system begins to runs uneven time after time
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