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Hi to all members,    My e34 got  a problem with air - cond control unit. The blower control unit just function on higher speed (level 4). 1,2,3 not function,related to the resistance unit control. I have try 2 recond unit from chop shop..but failed...has anyone has a spare or knew where to find the resistance/resonator unit???..Please Help.....:dontknow:Regards:Fourpot