Had my aircon regassed by KwikFit.
It was working fine until a couple of weeks ago, went for a drive to the coast, parked up and 2 big puddles appeared below the 2 evaporator drains. Worked most of the way home on the return trip but I thought the compressor sounded noisy and turned the AC off. Next time I tried the AC a couple of days later it didn't work, the clutch didn't engage and when I depressed the LP port schraeder valve there was only a bit of pressure in the system. I checked in the usual places for AC gas/lube leaks, didn't see any. So hoped it was just a case of needing a regas but still more than half expected to eventually find a leak.
Phoned KwikFit who told me "We wont do anything else with it if there's less than 1 bar pressure in the system when we put the machine on it". I told them "I think there is less than 1 bar pressure now but that might be due to me pressing the schraeder valve, I want a vacuum test running and if it passes I want it charging up". They agreed to that, so booked an appointment and went through. Passed the vacuum test. Started filling, the machine quickly put 540grams in but stuck at 540, it kept cycling between 'filling has slowed, building pressure so that filling can continue' and 'filling' but still didn't get passed 540grams. Then the machine told us to start the engine and turn AC on (which I expected) and it quickly finished filling up to 990grams. Aircon worked, the drive home was a lot cooler, when home I immediately got back underneath it checking for leaks but still didn't find any. This was yesterday and it's still working today so fingers crossed there won't be any quick leaks and the gas that was put in last time (around 5 years ago) has leaked out slowly over the 5 years.