Standard configuration uses Port M for main air

Utilizing these radiator valve stop pins ensures that the set point remains within a desired deadband

including those stamped with 311747

System Reliability: Critical for maintaining valve shut-off integrity and preventing bypass leakage caused by loose or shifting seating surfaces

Test for continuity across the leads to verify a burnout

York S1-024-19082-020 Sequencer Relay Standard configuration uses Port MThe York S1 024 19082 020 Sequencer Relay is a high performance 24V heat sequencer engineered to manage the staged activation and deactivation of electric heating elements within a furnace or air handler. Designed for direct OEM replacement, this heavy duty relay prevents excessive current draw and electrical overload by staggering the startup of multiple heat banks. It operates on a 24VAC control circuit, featuring precise timing intervals: the