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Focus MK2.5 AC clutch P0645 problem

Irvine241
Irvine241
in Ford Focus Club

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Hi guys! 
2 weeks ago my pressure switch sensor on the steering pump was died and leaked oil everywhere, i changed the sensor, its ok, but since then the AC wont work (Digital AC). DTC shows P0645 AC Clutch relay problem. The relay is good i checked it, the gas enough in the system. The ventillator starts when i turn the AC on, but the clutch wont  engageing.  I dont know where to start, change the AC clutch maybe or how can i check the clutch is good or not? Maybe the compressor died? Before the incident the AC is work fine,i think the hydraulic oil soak the compressor/clutch. 
Thanks in advance!

2008 Ford Foucus MK2.5 1.6i 74kw SHDA

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