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#1
11-11-2021, 05:32 AM
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HVAC Noise
 My HVAC has had this irritating whining-thud sound since I bought the car. It's almost like a servo is trying to move something but fails. Then tries again, and again, and again, forever. https://youtu.be/iW0OH-zTPLM I tried to capture a video of the sound. I enhanced the audio a lot as it's quite faint. You can really hear it after 14 seconds. It took me a long time to narrow the sound down to the temperature control! If I lower the temperature it goes away. Likewise if I raise the temperature it goes away. But fuck me if i want the temperature comfortable!.... Car: "enjoy the song of my people".  All other HVAC controls work fine. Air directs perfectly etc. Anyone have any ideas what it could be? 
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#2
11-11-2021, 12:37 PM
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Is the noise coming from the IHKA unit itself? If so, try cleaning out the vented areas on both sides of the unit. I used some of those GUM floss brushes with some compressed air in a can as mine was filthy. There is a fan behind one of the vents (I think onvthe right side) that can get dirty and become louder than normal.
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02 Imola on Black Dinan S2 4.6iS 00 RoyalRot on Sand/Black 740i Short Sport
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#3
11-11-2021, 12:45 PM
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Quote:
The buildup on the fan can be amazing. Mine looked like it chewed up a chinchilla Sent from my SM-A730F using Tapatalk
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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
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#4
11-11-2021, 12:56 PM
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Quote:
__________________
02 Imola on Black Dinan S2 4.6iS 00 RoyalRot on Sand/Black 740i Short Sport
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#5
11-11-2021, 01:57 PM
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I don't think the noise is coming from that panel, rather somewhere behind it.
If I put my leg on the side of the transmission tunnel plastic I can feel the light thud of something moving! I've cleaned out the fan before. Previous owner didn't have a dog thank god! 
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