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Interior and Cockpit
Interior Cockpit Filter
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<blockquote data-quote="flash" data-source="post: 122984" data-attributes="member: 62"><p>In my ex-E36, even though I have put the aircon in recirculating mode, the system will every now and then open the vent to allow some fresh air in. I can hear the vent opening and closing at frequent intervals. The problem is, the vents always open when I am passing a sewage treatment plant and I get assaulted with the bad smell. Asked the aircon guy once how to resolve it.... one way is to permanently seal the inlet (but not recommended).</p><p></p><p>Read somewhere it is a safety feature to prevent the air inside the car from getting stale and causing the driver to be drowsy / sleepy.</p><p></p><p>But if your aircon continuously let in fresh air even though it is in recirculating mode, then the vent mechanism could be faulty. It had happened to me before when the flap was not closing properly.</p></blockquote><p></p>
[QUOTE="flash, post: 122984, member: 62"] In my ex-E36, even though I have put the aircon in recirculating mode, the system will every now and then open the vent to allow some fresh air in. I can hear the vent opening and closing at frequent intervals. The problem is, the vents always open when I am passing a sewage treatment plant and I get assaulted with the bad smell. Asked the aircon guy once how to resolve it.... one way is to permanently seal the inlet (but not recommended). Read somewhere it is a safety feature to prevent the air inside the car from getting stale and causing the driver to be drowsy / sleepy. But if your aircon continuously let in fresh air even though it is in recirculating mode, then the vent mechanism could be faulty. It had happened to me before when the flap was not closing properly. [/QUOTE]
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