It is frequently used with Secop SC18G

Once the temperature drops below the differential set point (typically below 180°F)

ensuring a perfect 1/4" fit

Broad Compatibility: Directly compatible with Marley

and larger 325-9 series vent-limited regulators

York S1-025-26392-012 Rollout Switch It is frequently used withThe York S1 025 26392 012 Rollout Switch is a critical safety component designed for precise thermal monitoring in high efficiency gas furnaces and HVAC systems. As a genuine OEM York replacement part, this SPST (Single Pole Single Throw) limit control ensures the burner circuit is interrupted if a flame rollout condition is detected. This specific model features an automatic reset configuration, calibrated to "open" and break the electrical circuit