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    Complete HVAC Failure

    So long story short, when I went to start my car last night I found that the blower had stopped working on all 4 speeds. I went back this morning and found that the auxiliary fan and AC system had quit working. I checked the fuse box and found that fuse 3 and fuse 20 had blown. I replaced them, but got no functionality, but the fuses remained intact. I also opened the glove box to look behind the HVAC panel, and saw that there was a loose shiny silver rod with a plastic end piece, and a BOSCH motor with a plastic arm connected to nothing. (I am not sure if this is a recent failure). This might not be related, but I heard a snapping sound from the front of the car as I pulled out of my parking spot last night (after I had discovered the blower was not working). Has anybody experienced something similar to this, and if so, what was the problem?

    Car: 04/1987 325is

    Symptoms:
    • Fuse 3, 20 blown
    • Blower has no functionality on all 4 speeds
    • Auxiliary fan does not turn on
    • "Recirculate air" button does not function
    • AC button (normally engages blower and aux fan) is not functioning
    • AC button and recirculate button do not light up when pressed.
    • Disconnected metal rod behind HVAC panel (rod to move "recirculate air" flaps?) - seems to be disconnected at both ends
    • BOSCH motor close to disconnected rod (near glove box) with a plastic arm (on the "driver's side" of the motor) connected to nothing
    • Temperature when this all went down was about 26 degrees F (not sure if that helped to cause the problem)


    My thoughts:
    • It could be a broken AC / recirculate switch (but I don't think that would kill the blower)
    • The blower motor could be blown, which seems odd, because it was working fine the last time I drove it.


    Any help would be greatly appreciated!
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    Zinno 87 325iS

    #2
    The solution to this problem was an odd one. I had replaced fuse 20 and 3 originally but that did not do anything. I replaced them again today (with "better" quality fuses), while the car was sitting in a warm garage, and I got back full functionally of the aux fan and blower. (fuse 20 is for the blower and aux fan).
    sigpic
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    Zinno 87 325iS

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