reducing diagnostic and labor time during on-site repairs

allowing the safety circuit to verify the damper position before initiating combustion

and damper positions

including the AWH0400

York S1-025-43201-000 Switch 318423-701 reducing diagnostic and labor timeThe York S1 025 43201 000 is an essential OEM HVAC limit switch engineered for precision thermal regulation in heating systems. Featuring a Single Pole Single Throw (SPST) configuration, this electromechanical component is calibrated for a specific 26F open and 38F close thermal operational range. Designed as a critical furnace replacement part, it monitors internal temperatures to prevent overheating, ensuring the system operates within safe