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Samsung AQB18J6WC Limit Switch
Limit switches are crucial because if the air never warms up then the house will never get warm enough. The limit switch has a sensor located in the furnace that determines when the air is actually warm enough for the air to begin normal home circulation.
Major clues to watch for in a bad main limit switch
- The heating and AC system will not begin the ignition sequence or run longer than 10 minutes
- The HVAC system begins to initiate and then stops from time to time
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