Hello too. It’s about a Diavia retrofit air conditioning system. They were still common 20-30 years ago and my vehicle also enjoyed the grace of such a system. Two weeks ago I had the system refilled. 820g were filled in. (Standard manufacturer: 800g +/- 25g). However, the cooling effect was modest and the pressures in the high and low pressure part too high. Short contact with Webasto (they took over Diavia) took place, because of humidity the pressures were too high. I bought the spare parts. Now I was there yesterday to have the gas drained. The device pulled out only 510g. Then the mechanic immediately panicked, Mr. jeh, this system is enormous leaking! That raises doubts with me. Why? – Is the short hanging on the air conditioning unit (it was maybe 10 minutes) enough to really suck off the entire amount of gas. Say: Remain somewhere left in the dryer, compress or etc.? – Between the filling at the beginning of July and the installation of the plant there were 15 years… in which it lost 600g. Now it should have lost 300g in two weeks? I am also a bit unsure, can it be that it is leaking. Which leak detection method turns out to be the most reliable in experience? – Nitrogen? – UV lamp and additive? – Sniffling device?