VW Passat B5.5 A/C System Overview

The air conditioning system in the VW Passat B5.5 1.9 TDI (AVF engine) is a climate control setup utilizing a variable displacement compressor, a condenser, an expansion valve, and an evaporator. It is integrated with the engine cooling system, where the Fan Control Module (FCM) regulates radiator fan speeds to manage condenser heat dissipation based on refrigerant pressure and engine load.