Cranked up my air con the other week and just warm air flowed out, so I took my car to my tech and he converted it to R134a and I had lovely cold air. For a day. Next day- warm air again- so another charge, cool air for a day then next day nada. Then I went on honeymoon.
I know bugger-all about air conditioning systems so I presume I have a leak- my tech say he hopes it's not the evaporator which apparently is $$$'s.
Could it be anything to do with the conversion or something fairly easy to fix?

cheers.

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1993 320TE M104
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past:

1983 230E W123 M102
1994 E300D S124 OM606 (x2)
1967 250SE W108 M129
1972 280se 3.5 W108 M116
1980 280SE W116 M110
1980 350SE W116 M116
1992 300E W124 M103
1994 E280 W124 M104
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"music and women I cannot but give way to, whatever my business" -Pepys