Quote:
Originally Posted by RockDriver
I think I have a similar if not exactly the same problem. 2009 N62 V8 here. But my biggest suspicion is the electric flaps that regulate the air flow. Because my vents barely blow any air even when the fan is set to max, but after driving for some 15 minutes the car does warm up. So it can't be the valve, can it?
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Note that the vents will barely blow any air if the system is in auto mode where I suspect that the system is attempting to avoid blowing cold air in your face when it senses not enough heat in the heater core. To check your air flaps you would switch to the manual modes and turn up the fan, which seems to be what you've done.
If the heater valve and aux pump and heater core are working then you'll get warm air in the cabin from whatever vents are working.