3-Series (E46, E90)Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.
if it is that the a/c won't blow any air along with the heater then it is most likely the final stage blower resistor. however if it is the actual climate control display that works intermittently it might be something else.
deffinatly agree with the above, final stage unit...very common as long as it is just the blower speed that is intermittant (as in the head unit says max but it is blowing lower than max) if the unit itself flickers on and off it is the control unit.
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