R129 strange fan noise

Discussion in 'Interior' started by 94mattda, Jan 18, 2020.

  1. 94mattda

    94mattda Hardcore MB Enthusiast

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    Hello, I have a 1999 R129 320SL, the air con blows cold and everything regards the heaters and cold air works as it should however every now and then it sounds like the interior blowers have a surge of energy and blow a little bit more powerfully and then settle down again to normal after a few seconds. This happens regularly and I wandered if anyone else had this issue or is it normal?
     
  2. Wearsthefoxhat

    Wearsthefoxhat Active Member

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    Mine does the same, designed to get the cabin to the required temperature as quickly as possible and maintain it there.


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  3. OP
    OP
    94mattda

    94mattda Hardcore MB Enthusiast

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    E220 Coupe, Porsche Boxster
    Thank you, it does only do it for a few seconds though!! and more like it’s whilst I’m accelerating?
     
  4. alabbasi

    alabbasi Hardcore MB Enthusiast

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    If it's happening when accelerating then have the alternator tested , your voltage regulator may have gone bad.
     
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  5. OP
    OP
    94mattda

    94mattda Hardcore MB Enthusiast

    Messages:
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    Car:
    E220 Coupe, Porsche Boxster
    Ok thank you will get that done.
     

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