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Whirlpool ATR1545SPP0 Limit Switch
This is important because if the air is too cool inside the furnace to begin with, then you will never get hot air through the ducts. A normal limit switch has a sensor in the heating area that senses, or governs, when the air is actually warm enough for the air to begin normal home circulation.
Red flags of a barely functioning main limit switch
- The heating and cooling system will not initiate or run well like it is supposed to
- The HVAC system begins to go through the startup sequence but stops quickly on a regular basis
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