Audi Q7: Heating, Ventilation & Air Conditioning

 Control Module and Hydraulic Unit

Overview - Control Module and Hydraulic Unit   Note If the ABS Control Module -J104- is faulty it can be replaced separately. If the ABS Hydraulic Unit -N55- is faulty it must be replaced together with the ABS Control Module -J104-. Control Module and Hydraulic Unit 1 - Nut

 Refrigerant R134a

Refrigerant R134a Physical Data Vehicle air conditioning systems make use of the vaporization and condensation process. In this case, one works with a substance which boils easily, designated as refrigerant. The refrigerant used is tetrafluoroethane R134a, which boils at -26.5 ºC (-15.7 ºF) at