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The BMW Range
5 Series
E39
Air blower noise from Air-Cond Control Panel
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<blockquote data-quote="bimmerholic" data-source="post: 473086" data-attributes="member: 16686"><p>It's your HVAC Sampling Fan that's making that buzzing noise.</p><p>It makes that buzzing sound when it there's a lot of dust around it. What you need to do is, remove your HVAC (a/c controller unit) and open it up, locate the fan, clean it, oil it at the shaft...and you're good to go.</p><p></p><p>Cleaned mine twice. Reason why even before starting the car, you hear it is because when you unlock the car, the HVAC is armed. Just like the orange light next to "P" on your gear lever.</p><p></p><p><img src="http://www.bimmerboard.com/members/mario778/HVAC%206.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Here's the DIY write-up: <a href="http://www.bimmerboard.com/forums/posts/428942/" target="_blank">http://www.bimmerboard.com/forums/posts/428942/</a></p><p>Easy. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="bimmerholic, post: 473086, member: 16686"] It's your HVAC Sampling Fan that's making that buzzing noise. It makes that buzzing sound when it there's a lot of dust around it. What you need to do is, remove your HVAC (a/c controller unit) and open it up, locate the fan, clean it, oil it at the shaft...and you're good to go. Cleaned mine twice. Reason why even before starting the car, you hear it is because when you unlock the car, the HVAC is armed. Just like the orange light next to "P" on your gear lever. [img]http://www.bimmerboard.com/members/mario778/HVAC%206.jpg[/img] Here's the DIY write-up: [url]http://www.bimmerboard.com/forums/posts/428942/[/url] Easy. :) [/QUOTE]
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The BMW Range
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E39
Air blower noise from Air-Cond Control Panel
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