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Hi, trying to get my head around a 307, I changed the a/c compressor on. It worked for approx 24hrs. Then no cold air? magnetic clutch(Y11) engages, 425grams of 134a refrigerant added. 13.5v at control valve(Y156)scope indicates - no digital square wave.scan tools Launch & moduis ultra- failed to commuincate with the BSI or a/c module. Ok with engine codes & data. Fuses,ok. F1 30/50a, F1 20a, f1140a etc. Same module(A11-II)that does control valve also engages clutch, so basic 12v & earth are ok. Also no HVAC control to vents,only going to face. Control panel ok, selects foot/face etc. I am wondering what I can do next? or What should I do? Any help would be really appreciated, or if you could put me in touch with the right person. Thanks for reading
 
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