Hello i need help with my BMW E87. I've got some anoying problems. When i press blow to windshields on my AC control unit sometimes it blows to me and sometimes to feet and the opposide when i press to feet it blows to windshield. Or sometimes it doesen't work. AC control unit has been changed. The computer shows problems like ac vent flap motors solar radiation sensor problems. Feet sensor tempetature faults. Any ideas how to fix it? Tried searcing for the similar case but didn't find anywhere.