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Samsung AVMWH040CA0 Limit Switch
The limit switch contains a sensor in the heat exchanger that decides when the heated air is warm enough for the blower to be activated. Limit switches are crucial because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts.
Major signs of a barely functioning limit type switch
- The system starts to run inconsistently from time to time
- The heating and AC system will not initiate or will not stay running longer than a minute
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