The switch should read as "closed

making it suitable for modern high-pressure systems including R-410A and R-134a

Is this compatible with more than one York model

Enhanced System Reliability: High-grade internal contacts resist pitting and carbon buildup

'HERM' for the compressor

York S1-024-24101-700 Contactor The switch should read asThe York S1 024 24101 700 is a field ready 2 pole contactor designed for high reliability switching in residential and light commercial condensing units. This component is the primary technical equivalent for the 3100 20Q315, specifically engineered to handle a 20 Amp inductive load. Operating on a standard 24V coil voltage, the 2PNO (2 Pole, Normally Open) configuration ensures that both legs of the power supply are disconnected during the off cycle,