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C and E Series
Since it is normally closed
direct-fit installation across various packaged units and air handlers
As the direct updated replacement for the obsolete 312900 model
It is designed to open or close one circuit only
Williams P323031 Limit Switch C and E SeriesThe Williams P323031 Limit Switch is a critical genuine OEM replacement part engineered specifically for technical compatibility with Williams Comfort Products floor furnaces. This fixed temperature 95F limit switch serves as a primary safety control, monitoring the internal cabinet air temperature to prevent heat exchanger damage and system overheating. As a vital component for gas furnace safety control, it initiates a circuit break if temperatures