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Whirlpool ATR1553BPP0 Limit Switch
The limit switch contains a sensor in the heating area that determines when the heated air is warm enough for the main blower to kick in and circulate the air. Limit switches are built because if the warmed air is too cool the you will lose all the heat as the air flows through the ducts.
Hints of a deteriorating main limit switch
- The system starts to erratically often
- The HVAC system refuses to kick in or run well longer that five minutes
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