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The BMW Range
3 Series
E36
E36 Aircond system
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<blockquote data-quote="jarance" data-source="post: 334694" data-attributes="member: 21"><p>The ttakk sound is the vane opening to the blower. The vane is either diverted to external or recirculation mode.</p><p></p><p>When you off the engine, you would sometime hear the sound of the vane closing. </p><p></p><p>Try to select between recirculation and external mode. See whether the sound is the same when the vane is closing or opening.</p><p></p><p>As long as air is coming out from the louvers, it OK. If the air flow is low when in re-circulation mode, it means that the microfilter is choked.</p></blockquote><p></p>
[QUOTE="jarance, post: 334694, member: 21"] The ttakk sound is the vane opening to the blower. The vane is either diverted to external or recirculation mode. When you off the engine, you would sometime hear the sound of the vane closing. Try to select between recirculation and external mode. See whether the sound is the same when the vane is closing or opening. As long as air is coming out from the louvers, it OK. If the air flow is low when in re-circulation mode, it means that the microfilter is choked. [/QUOTE]
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