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Hi everybody.
Another X5 E53 air con problem. I have been struggling with this one a long time. Air con not working. I finally gave in and took it to the local independant expert. He had the car for 5 hours and couldn't find the fault. What he did say was that when he hooked the car upto the diagnostic machine (and he tried 2 machines) he could not find the HVAC unit on the diagnostic menu. So was thinking that if he can't communicate with the device maybe that is the fault, the unit. I am assuming the control unit is mounted in the dash and is the control for the automatic aircon. I can maybe get a salvage unit and swap it. I just want to be sure I am going to swap the correct thig. Hope this makes sense. Anybody have any thoughts.
Cheers.
 
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