York S1-031-09179-000 Board Els PW 17895 The 755-50 is typically used

The 755-50 is typically used as the upper control in a two-element system or as the primary control in a single-element series circuit where a full power disconnect is required

Engineered from high-temperature resistant composite materials

Optimized Airflow: The double inlet design maximizes air intake for efficient heating and cooling cycles

contractors ensure a precision fit that eliminates vibration and extends the operational life of the entire drive assembly

The barbed fitting connectors are designed to securely grip 1/8" through 1/4" ID flexible plastic tubing

York S1-031-09179-000 Board Els PW 17895 The 755-50 is typically usedThe York S1 031 09179 000 24V Relay Lock In Board is a critical control component designed for precise sequence management in commercial and residential HVAC systems. This genuine OEM part serves as the direct replacement for S1 031 09155 000, addressing common communication failures and relay chatter issues found in older board revisions. Operating on a standard 24V AC control circuit, this board functions as a lockout relay, preventing short cycling