the auto reset has likely failed

it must be replaced to prevent safety hazards

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

This part is the primary seal for the McDonnell & Miller Series 69 mechanical low water cut-offs

York S1-025-26392-001 Limit Switch the auto reset has likelyThe 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