The heating and air conditioning in my car works fine; however, when I shut the heat OR the car off, the fan continues to blow until the car battery dies. I would like to confirm that this is actually a heat blower issue since the heat works. Why is this not a relay/resister issue? What is the estimated cost of such a repair and the time involved in dismantling the dashboard for repairs. We turned the unit off to avoid killing the battery; however, it is 23 degreess. I need heat in the car.
Heating/Blower Fan on 2002 BMW 325i
by spgraham in Atlanta, GA on December 20, 2009
ANSWER by matte on December 21, 2009
My experience with technicians who know BMWs is that even the AC system is really complex--it has a computer that is relatively robust dedicated to its operation. This means that you'll likely be best off with some professional help. The short answer is that it's not a relay problem because BMWs are so complicated they tend to have dozens of relays.
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