Connections with Valve for Refrigerant Circuit Switches

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

There are different threads for switches on high and low pressure sides.

Fig 1: Identifying Service Port Components

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Only valves and O-rings resistant to R134a refrigerant and the related refrigerant oils are to be used.

A - Connection (soldered in)

B - O-ring

C - Valve (with O-ring)