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The BMW Range
5 Series
E39
E39 aircon fan auto on/off even when engine is off
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<blockquote data-quote="selfmech" data-source="post: 386566" data-attributes="member: 3514"><p>Hi Jaleeks23,</p><p></p><p>Not sure which year is yours but there is two types of aux fan for E39. Pre '98 (4 wire connector) and post '98 (3 wire connector). I just replace mine twice as my ori fan bearing worn out so I went and bought a VEMO (made in Germany) where it lasted less than 4 months. Now I installed the ori Seimens fan and is working fine.</p><p>A lot of issues with the VEMO fan that cannot read the pulse for the ECU hence the speed becomes abnormal and at times when the engine is off it will run itself like what you have experienced.</p><p>Check your fan type. Pre 98 ones can be repaired if the resistor is out whilst the post 98 ones its best to buy the ori.</p><p></p><p>Rgds.</p></blockquote><p></p>
[QUOTE="selfmech, post: 386566, member: 3514"] Hi Jaleeks23, Not sure which year is yours but there is two types of aux fan for E39. Pre '98 (4 wire connector) and post '98 (3 wire connector). I just replace mine twice as my ori fan bearing worn out so I went and bought a VEMO (made in Germany) where it lasted less than 4 months. Now I installed the ori Seimens fan and is working fine. A lot of issues with the VEMO fan that cannot read the pulse for the ECU hence the speed becomes abnormal and at times when the engine is off it will run itself like what you have experienced. Check your fan type. Pre 98 ones can be repaired if the resistor is out whilst the post 98 ones its best to buy the ori. Rgds. [/QUOTE]
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E39 aircon fan auto on/off even when engine is off
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