Trane CNT4333 Dual Compressor Defrost Control Board

The Trane CNT4333 Dual Compressor Defrost Control Board is one of the control boards designed to address dual compressor Trane heat pumps and ensure they run efficiently. This circuit board controls the defrost function which keeps ice from forming on the coils of the outdoor unit during freezing weather. Through a timed sequence of the heating element, the control board is able to maintain high efficiency of heat exchange and avoid certain performance problems. The board is powered by a conventional 24V power supply and is intended for use in 60 Hz electrical infrastructure. It is a relatively light component, The integration of a dual compressor defrost control board has a number of advantages.