This is a Brand New OEM Upgraded Source1 Heat Pump Defrost Sensor. Source1 is the OEM source for all parts used in York, Coleman, Evcon, and Luxaire HVAC equipment The sensor is rated at F38-12F. It replaces the old part numbers listed below.
Sensors detect events or changes in their environment, and then relay the information to another device, typically a control board.
025-27727-003 S1-02527727003