Precision thermal sensing at 300°F prevents hazardous conditions resulting from flame rollout

Engineerd for York

slop-free connection to the faucet stem

For any contractor performing a motor swap

installing a fresh Lochinvar 100208086 gasket is standard best practice to prevent air-fuel ratio imbalances or localized overheating

York S1-025-35397-000 Limit Control Precision thermal sensing at 300°FThe York S1 025 35397 000 is an essential manual reset limit control engineered for precision thermal monitoring within high efficiency furnace heat exchangers and air handling units. As a genuine OEM York replacement part, this HVAC safety switch is calibrated to provide high limit protection by breaking the electrical circuit to the gas valve or ignition control if internal temperatures exceed factory safety thresholds. Unlike automatic switches,