Audi R8 air con

[Freddie328]

Hi
During a spirited drive on a hot day on the German Autobahns the R8 very quickly lost all its A/C gas,
There's no evidence of stone damage or oil leakage from the condensers.
Does this system have a relief valve that may have opened? The cars in Italy at the moment so a recharge if this is the case would be doable but not a strip down to replace faulty components.
Any info much appreciated
Thank you

[Nedzilla]

Mine lost its gas last year and turned out to be a leaking pressure switch,whatever that is! Turns out to be quite common from what I've read on the R8 forum and was only a £200 job to fix at a local specialist.

[Dr G]

Yes, can be a pressure switch, can be corrosion on the very bottom of the rad and can be the compressor itself :s

[Freddie328]

Thanks for your replies.
Can the pressure switch be accessed without removing the bumper?

[Freddie328]

Hi Dr G
Ive located the problem to a leaky pressure switch.
Is the low side charging point by the front of the engine on the LH side?
Is this a standard fitting?
Is there a high side connection point anywhere?

[benfj180]

Hi Freddie,

Defo try the pressure switch first.

Is accessible by removing the passenger side (UK cars) headlight.

Takes about 10 mins, dead easy.

Loads of info on R8talk.com.

FYI I tried re gassing prior to replacing the switch to no success.

I then got it on the diagnosis machine and it reported a failed pressure switch.

When I got to it, the housing was split. Audi have subsequently upgraded this part. (old one is white, new one is black).

Good luck