Help! Grumbling A/C on 997.1

[Gixer968CS]

Hi All,

This is the second ask on this subject as I now have more info. I have a 2006 911 (997) C2S and the A/C has an issue, I just don't know what and before I splash some cash I wondered if anyone might know the answer:

The a/c is chilling a little (e.g. does get the vented air cooler than the car's ambient temperature), but does not get "cold". It used to be like a meat locker in there with the air on full chat, but not now. When I run the a/c (i.e. turn the fan on in the car) after a few minutes I get a kind of whining or groaning noise from the back of the dashboard/bulkhead area of the car. As if something is labouring under there. It's quite noticeable. As far as I'm aware there isn't anything mechanical to do with the a/c in that area of the car. Also, you can definitely hear a kind of whoosing/slooshing sound through the vents with the a/c on. I've checked in the back and the compressor engages and disengages as it should and is not noisy.

Any ideas before I go and splash £60+ on a recharge/leak test?

Thanks

[Gixer968CS]

Thanks everyone. I'm pretty confident I can change out the condensers myself. Design911 will sell me the pair (made by Hella), with o-rings and a drier for c£200. My issue is being sure that the condensers are the problem. Obviously I need a leak test done so I can be sure where the leak is. Halfords and Kwik-Fit do free leak tests, but people here and other places are saying they're not very good - i.e. people being told there is no leak, having the gas topped up, only for it to leak out again a few days later. Who do I trust to do the leak test properly? I live in Kent (Sevenoaks)