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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 11-22-2003, 08:37 AM   #1 (permalink)
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Hi all,

I have an E39 with an erratic heater blower problem. Has anyone had similar problems, and if so how do you fix it?

Cheers in advance.....
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Old 11-22-2003, 10:53 AM   #2 (permalink)
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more specific plz
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Old 11-22-2003, 10:46 PM   #3 (permalink)
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Hi alanh,

The heater blower intermitantly increases in speed, sometimes upto full power whether it's in auto or not. And I have no control over it apart from turning the blower off.
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Old 11-24-2003, 04:59 AM   #4 (permalink)
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isnt that supposed to happen when you turn the climate control to 32? it keeps the car at the same temp at all times ?
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Old 11-24-2003, 08:34 PM   #5 (permalink)
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Quite possibly. But this happens ant any temperature.
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Old 01-07-2004, 11:40 AM   #6 (permalink)
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Hi

I have the same problem. You should be able to turn off 'auto' and reduce the blower level to the minimum without the climate control taking over as far as I know and when I do this, I get the same symptoms as you. I'm wondering whether this could just be loose connections as my fans tend to cut out for a short time when I hit a bump in the road. I'm having it serviced by a dealer in the next couple of weeks so will see if they can advise.
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Old 01-08-2004, 03:08 AM   #7 (permalink)
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Cheers Nick,

Please keep me posted.
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Old 01-23-2004, 11:36 AM   #8 (permalink)
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Just had the car serviced at the dealer and, as predicted by other posts on the board, it was a faulty sensor (Apparently happens quite a bit. The part was 50 + fitting so not a cheap fix, but certainly cheaper than a new climate control unit. If you need the full name of the unit, let me know and I'll dig out the docs.

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Old 01-24-2004, 01:27 AM   #9 (permalink)
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They probably replaced the blower RESISTOR/FINAL STAGE UNIT. It's not a sensor.
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