Rheem-Ruud 47-100955-01 Defrost Timer Assembly Common signs include the compressor

Common signs include the compressor "humming" but failing to start

This 185F manual reset limit switch is designed to break the electrical circuit if the heat exchanger exceeds its safe operational threshold

making it suitable for modern high-pressure refrigerant cycles

Automatic Reset: The auto reset functionality eliminates manual intervention after a high-temperature cycle

As a genuine Source1 repair part

Rheem-Ruud 47-100955-01 Defrost Timer Assembly Common signs include the compressorThe Rheem Ruud 47 100955 01 Defrost Timer Assembly is a critical OEM HVAC replacement part engineered for precise management of the heat pump defrost cycle. Designed to integrate seamlessly with residential and commercial Rheem HVAC equipment, this time initiated, temperature terminated control prevents excessive ice buildup on the outdoor evaporator coil. By regulating the transition between heating and defrost modes, the 47 100955 01 maintains