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Precise R-22 superheat regulation to optimize evaporator efficiency
Contractor-Grade Reliability: Built with high-temp resistant materials to ensure stable switching performance in the harshest furnace vestibule environments
making it suitable for varying steam and fluid pressure requirements
a high-precision 1k ohm thin-film nickel temperature sensor designed for rigorous HVAC service
Because this is an inverse operation (10K Ohm) model
Williams P323663 Safety Switch 319852-301 Precise R-22 superheat regulation toThe Williams P323663 Safety Switch is a critical OEM vent limit protection component designed to maintain the operational safety of your gas fired heating equipment. Engineered as a safety limit switch for Williams wall furnaces and vented room heaters, this part features a high precision sensor that triggers at a fixed 200F temperature. When the exhaust gases in the vent reach this thresholdoften due to a blocked flue or inadequate draftthe switch
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