A7 ac expansion valve

[Scotta7]

Does anyone know the location of the ac expansion valve on a 2012 A7. Also I am having a slight hissing noise coming through the AC vents while the compressor is running. No other issues with the system. Air is cold. If I turn the AC off the sound goes away. Any thoughts.


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[wwhan]

Shown in Audi SSP 990603

[Scotta7]

Thanks for the diagram. If anyone is having a similar issue you are low on ac refrigerant. Mine was low due to my shrader valves slowly leaking. Valves replaced and system recharged and everything is good.


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