the S1-2HK16502006 features an integrated circuit breaker to simplify field wiring and ensure overcurrent protection directly at the unit

Wide rated voltage compatibility (24V to 240V AC) for seamless integration with various actuator models

Replacement is necessary if the fan guard shows signs of heavy oxidation

it serves as the central processing unit

allowing for installation in any orientation on the liquid line

Williams P323080 Fan Switch 321702-401 the S1-2HK16502006 features an integratedThe Williams P323080 Fan Switch is a critical OEM replacement part engineered for precise thermal control in Williams Monterey furnaces and direct vent gas heaters. This furnace fan limit switch functions as a normally open, temperature actuated control, ensuring the blower motor engages only when the heat exchanger reaches the appropriate operating temperature. This prevents the circulation of cold air during the heat up cycle and protects the system