[svxistentialist]

I was joking Petr.

Did you not see the winky smilie??

I can't figure out your problem. You say it shows no codes. Can I presume from this you know the routine for the A/C codes, how to make the system check itself?? [By this I mean A/C codes do not show up on the Check Engine codes, they run off a different computer]

See this document: Aircon diagnostics

What it would suggest to me your system is not fully charged with refrigerant maybe. Or you have a problem with the refrigerant pump[compressor]. During certain "fault" situations, the pump does not switch on. You should be able to check if it is turning, and so pumping, under the hood. Have you checked if the magnetic clutch is actually turning the pump in these high temperature situations when the system is only pumping hot air??

Joe