it must be replaced to prevent safety hazards

Common Questions Is the HUS1207 compatible with all 6-pin wiring harnesses

verifying total external static pressure (TESP)

the auto reset has likely failed

York S1-025-26392-001 Limit Switch it must be replaced toThe York S1 025 26392 001 Limit Switch is a critical safety component designed for precise thermal regulation in York HVAC systems. This OEM replacement part (cross referenced with part number 208X06) features a Single Pole Single Throw (SPST) configuration with an open on rise switch action. Engineered for high temperature protection, it is calibrated with a 150F fixed open temperature to interrupt the burner circuit during an over temperature