A/C not working

[UZZ30-Québec]

Hi there.

My A/C is not working, I suspect the gas leaked from it. Usually, wich part tends to leak and how can i find it without changing the hole system?

Also, for re-filling, do you recommand the new Duracool or the good old R-134?

 

[doey]

Most aircon places put a dye in with gas, which can be seen under ultra-violet
light. Using an ultra violet torch the leak stands out like dogs balls.