1. I set the auto settings to max power (of the three levels provided) 2. I have turned off the rear vent (since nobody usually is in my backseat) to get more power in front vents. 3. I brought the car in to dealer and they tested the a/c levels and said its working fine.In this article, I'll go over the steps involved with replacing the radiator on BMW E90 models. Be sure to work with a cool engine and confirm the cooling system lacks pressure before opening cooling system. Drain cooling system. See our tech article on cooling system draining and filling. Remove electric cooling fan.
1. p4ddy.b. 117 posts · Joined 2017. #9 · Feb 25, 2017. Not dying to hyjack the thread but my tests maybe showing the same issue. I've just tested the power to the relay when the switch is pressed and when off I have 12v to 30,85,86 and 0v at 87 on the relay. When its on I have 12v at 85,86,87 but 0v at 30.
16. Air conditioner control unit (heater controls) 17. Plug - extra fan motor (on extra fan motor I) 18. Relay - extra fan stage II (on power distributorI 19. Relay - extra fan stage I (on power distributori 20. Switch - high pressure pressostat (drier) 21. Switch temperature 110°C(only for 524td) 22. Motor-heater blower 23. Motor - evaporator . 23 282 17 317 113 60 316 232 203