Its not been working recently so went to see my fridge repair man (strange you might think, but he does a lot of cars and is a lot cheaper than a garage) who emptied the system, cleaned and vacuumed it out, pressure tested it and re-gassed it. All seemed ok until I got the car home and there was a loudish 'hissing' sound. Left it over night and by morning the hissing had gone, but so had the cold air from the A/C.
Called him up yesterday and he said next course of action is to use a leak detection dye that shows up with UV light. Got to go out on Sunday to get that seen to. Hopefully its a pipe thts gone and not the compressor (or is it condensor...?)
The hissing sounded like it was from the front of the engine bay but checked the pipes under the air box (and found it had been de-restricted! ) and they seemed ok, apart from the big rubber one that goes into the bit where the gas is put in, if that makes sense? It looked like it was not connected properly.
Anyway, total cost so far for the re-gassing, cleaning nd the leak detection dye...... 2 bacon butties. Helps to know the right people I say.