York S1-025-35383-000 Control 318172-701 preventing bypass leakage that can

preventing bypass leakage that can lead to valve hunting or premature seat erosion

preventing the premature wear of the fan blade or overheating issues commonly associated with "universal" alternatives

This switch usually trips due to physical obstructions in the air intake pipe

Under normal ambient conditions (above 40°F but below 50°F)

Wide Application: Compatible with natural gas

York S1-025-35383-000 Control 318172-701 preventing bypass leakage that canThe York S1 025 35383 000 Control is a specialized SPST Defrost Control engineered for precise temperature management in residential and light commercial heat pump systems. Designed as a high reliability HVAC replacement part, this switch operates on a fixed temperature differential, featuring a 55F Open (55Op) and 31F Close (31Cl) logic. This OEM York sensor ensures the outdoor coil effectively cycles through defrost modes to prevent ice