Hello there and welcome to the BMW Car Club of America.

If you are a BMW CCA member, please log in and introduce yourself in our Member Introductions section.

1982 633 Whining Noise

Discussion in 'E24 (1977-1989)' started by imacipc, Dec 9, 2013.

    • Member

    imacipc MI 633csi

    Post Count: 12
    Likes Received:0
    I have begun experiencing this problem recently since it has gotten colder out. After the car warms up, at around 2300rpm a very loud whining noise begins coming from the area around the climate control unit. My e24 has the older-style layout, and when the temperature selector knob is turned to the high-heat/defog setting the sound goes away. Any thoughts? I posted a video of the issue below.
    • Member
    • Technical Service Advisor

    charlson89

    Post Count: 1,193
    Likes Received:56
    So if you turn the blower speed up or down/ off does the noise change?
    • Member

    imacipc MI 633csi

    Post Count: 12
    Likes Received:0
    No the noise remains the same regardless of fan/blower speed. The air flow knob does not affect the sound either, but that knob is stuck (posted in a previous thread but has been addressed). However, I did not mention this earlier but I have noticed that there is a bit of resistance in turning the knob before the sound goes away. It feels as if there is like a threshold you have to "break through" before continuing to turn the knob, after which there is no more resistance. UPDATE: The knob resistance has something to do with the cigarette lighter, but has no affect on the noise itself when the stopping problem is removed.
    • Member
    • Technical Service Advisor

    charlson89

    Post Count: 1,193
    Likes Received:56
    So when you adjust the temp knob to hot the noise goes away correct, but is there from cold to almost full hot?
    • Member

    imacipc MI 633csi

    Post Count: 12
    Likes Received:0
    That is correct, from about 3/4 heat to full heat the sound goes away, however the sound is there at any other temperature below 3/4 whether off or on A/C.
    • Member

    Ken.S.330

    Post Count: 112
    Likes Received:8
    I get a whining noise too when I have the heat turned down, usually it's my wife complaining that she is cold. ;)
    • Member
    • Technical Service Advisor

    charlson89

    Post Count: 1,193
    Likes Received:56
    Sounds like your heat blower motor is making the noise would be my best guess. In your vehicle there are two blower fans one for A/C and one for heat. As you adjust the temp it will decide which fan to turn on. I would look into the fan.
    • Member

    imacipc MI 633csi

    Post Count: 12
    Likes Received:0
    Thanks for the help! I wish it were as easy to fix as my girlfriend's complaining! :D

Share This Page