York S1-025-26392-012 Rollout Switch and Comfortmaker units

and Comfortmaker units

Industrial Materials: Built with high-heat resistant fiber to prevent air bypass and heat transfer to the exterior cabinet

The closed-end acorn design shields exposed threads from moisture and debris

How do I diagnose a failing PTC relay

York S1-025-26392-012 Rollout Switch and Comfortmaker unitsThe 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