In my 1988 M30-530i, fitted with A/C and auto climate control, the blower motor only works when I turn the blower-speed-dial all the way to full-power (when the dial is moved past the "click").

If it's in an intermediate setting, it will work for about 1-3 minutes after starting the (cold) car. Then it will die and afterwards only the max-power setting will work.

Any ideas on how to solve this nasty bug ? (full-power blower makes too much noise for everyday use and A/C is quite cold at full-power ).

Thanks in advance,

Joop,
The Netherlands