I would expect it to get cold even sitting still, that tell sme that the clutch is not engaging, or the compressor is not engaging properly?
It could be if ithasnt been used properly in a while that it was stuck, in which case the drive may have shook it loose, but I would say keep an eye on it!
i'll keep an eye on it and see how it goes
410 grams I would think.
Is the radiator cooling fan running when your idle?
i'll need to check, i've also an aircon bomb to do, so i'll check when thats working