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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 04-02-2005, 08:33 AM   #1 (permalink)
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On an E39 at idle is the electric fan suppost to turn on, if the engine begins to overheat, or is it only related to the A/C?
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Old 04-02-2005, 08:50 AM   #2 (permalink)
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The Aux fan has two modes.

1. Always on with AC selected.

2. Turns on based on the temperature switch (values/) that screws into side of radiator. Some have two temperature settings (highand low) and others one.
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Old 04-11-2005, 07:51 AM   #3 (permalink)
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So...is that a yes or no. Should the electric fan come on at any temp, with the a/c off?

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Originally posted by Bear@Apr 2 2005, 10:50 AM
The Aux fan has two modes.

1. Always on with AC selected.

2. Turns on based on the temperature switch (values/) that screws into side of radiator. Some have two temperature settings (highand low) and others one.
[snapback]323720[/snapback]
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Old 04-11-2005, 09:16 AM   #4 (permalink)
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Quote:
Originally posted by tacroteau+Apr 11 2005, 06:51 AM--><div class='quotetop'>QUOTE(tacroteau @ Apr 11 2005, 06:51 AM)</div><div class='quotemain'>So...is that a yes or no. Should the electric fan come on at any temp, with the a/c off?

<!--QuoteBegin-Bear
@Apr 2 2005, 10:50 AM
The Aux fan has two modes.

1. Always on with AC selected.

2. Turns on based on the temperature switch (values/) that screws into side of radiator. Some have two temperature settings (highand low) and others one.
[snapback]323720[/snapback]
[snapback]329990[/snapback]
[/b][/quote]

with the a/c off it will come on at a pre-determined temp.
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Old 04-13-2005, 10:42 AM   #5 (permalink)
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Ok, mine is not turning on at all any ideas?

Quote:
Originally posted by njtech+Apr 11 2005, 10:16 AM--><div class='quotetop'>QUOTE(njtech @ Apr 11 2005, 10:16 AM)</div><div class='quotemain'>
Quote:
Originally posted by tacroteau@Apr 11 2005, 06:51 AM
So...is that a yes or no.* Should the electric fan come on at any temp, with the a/c off?

<!--QuoteBegin-Bear
Quote:
@Apr 2 2005, 10:50 AM
The Aux fan has two modes.

1. Always on with AC selected.

2. Turns on based on the temperature switch (values/) that screws into side of radiator. Some have two temperature settings (highand low) and others one.
[snapback]323720[/snapback]

[snapback]329990[/snapback]
with the a/c off it will come on at a pre-determined temp.
[snapback]330022[/snapback]
[/b][/quote]
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Old 04-13-2005, 06:34 PM   #6 (permalink)
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Check the fuse (number 25 I think) in the forward fuse box. Mine went recently. It uses a 30A fuse. If the fuse is OK then check the Aux Fuse Box (I think it is called). It is infront of the left strut. It contains the high speed and normal speed relays.

Hope this helps
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