If you are interested here is a good pdf on diagnosis of AC problems, if you have any questions feel free to ask me as well, I have 14 years in the industry prior to Thailand.

http://p.thaivisa.com/specials/air_con_compressor_diagnosis.pdf

Thanks for that, race cars don't have A/C and it's the first thing we usually tear out when building one, so not as familiar as I'd like to be and I'm currently having issues with mine. Pretty sure this confirms my suspicion of the problem now..

Thanks for that, race cars don't have A/C and it's the first thing we usually tear out when building one, so not as familiar as I'd like to be and I'm currently having issues with mine. Pretty sure this confirms my suspicion of the problem now..

What symptoms are you having in what vehicle?

Older GTI, It needs to be evacuated and recharged..