York S1-025-27727-001 Limit Switch This class 2 transformer is

This class 2 transformer is built with a versatile mounting configuration

Direct OEM Compatibility: Serves as the official successor to 624721 and 621957

a high-precision #42 burner orifice designed for specific gas furnace manifolds

you enable the lever-acting regulator to handle higher pressure requirements while maintaining the positive dead-end lockup performance essential for safety and efficiency

This 2-stage relay typically provides an on-timing delay of 1 to 20 seconds and an off-timing delay of 40 to 110 seconds to protect heating elements

York S1-025-27727-001 Limit Switch This class 2 transformer isThe York S1 025 27727 001 is a critical HVAC replacement limit switch designed for precision thermal monitoring in residential and commercial climate control systems. This SPST auto reset limit switch operates within a tight 25F to 41F temperature range, ensuring the system maintains safe operating parameters during cooling and heating cycles. Engineered as a genuine York OEM furnace part, it is frequently utilized in single duct applications and