including multi-stage and high-efficiency gas furnaces

and 8324 series

If you are troubleshooting a failed startup or hum in an exterior condenser unit

suitable for rooftop units and high-ambient equipment rooms

F dew point settings are protected from thermal-related communication errors

York S1-025-26366-002 Limit Switch Els PW 17895 including multi-stage and high-efficiency gasThe York S1 025 26366 002 Limit Switch is a critical safety component designed for precise thermal regulation within HVAC systems. This OEM replacement part functions as a SPDT limit switch, featuring a specific temperature range of 120 180F. When the plenum temperature reaches the 180F high limit threshold, the switch opens the circuit to the gas valve or heating element, preventing the heat exporter from catastrophic failure. Once the system cools