Bmw f30 problem with a/c compressor engage

WELL !! PROBLEM SOLVED !!!!
So if anyone experince problem like i ws have and also carkiller the problem is located on Blower regulator 64119276112 i konw i knowwwwwwwwwwwwwww is sound crazy
but that fuc...g piece have a linbus wire so it must deal with something it must know something it must give FEM or IHKA some information that are not read corectly is theat
Blower regulator is damage ... IMPORTANT .. ALL THE FUNCTION OF THE BLOWER was working corectly even the Blower regulator is damage the only thing that is damage on it
i think is the respone message that he is send back to the fem or ihka throught the lin bus ..
it was a nightmare changing almout all parts on car including FEM DDE IHKA REM DSC KOMBI .........
Thank you guys for trying to help me
thanks
carkiller for all the info ..

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Hello i have a problem with bmw f30 with a/c. Everything its ok temp. Outside temp. Inside refrigerant pressure 5bar compressor run-out protektion in ista set to 0 adding refrigerant (before less 200g)but no clutch on in compressor still off. I try test compressor in istad and everything work fine (2 minute test a/c) refrigerant grow up to 8 bar fan working and temp inside low but when i stop test a/c not working. I try test in fem clutch compressor and ok. Check FA in esysy and its original. I code full module with ori FA and the same problem. Change ihka module on air  distributor, coding and the same problem. Please help me because i dont know what is wrong. Check coding in ihka and fem and "magnet coupling" set to on. Thanks for help.

solved see my last post !!!

I am proud of you Xallecs manny thanks.

Superb!! This will save many souls!!!

i confirm this solution - you guys are great to share it, i was on the same road already, changed fem, had same working car for comparison...

thanks again !