AC main flap noise

BimmerSI · 03-30-2021, 02:35 AM

Hi guys!

I need your help finding out a way to lubricate a main IHKA vent flap. It is the one that opens and closes when you start the car and when it goes to sleep. It changes also when moving right temp slider and it makes some fine adjustments on its own... I believe it is the flap for outside are circulation.

Would it be possible to access with a long staw and inject some silicone grease to the rubber or something?

It drives me crazy. Not that first time it opens but that mini adjustments that creaks all the time in the vent when it moves during the driving.

Thanx for you help. Really appreciate it.

Take care,
BimmerSI

https://vimeo.com/530672860

https://youtu.be/EOib6wuPAUA

BimmerSI · 03-30-2021, 09:10 AM

Well I managed to dig into this a little further. BMW is actualy aware of this issue and recommends lubrication of stratification motors. The problem is that car has several flap motors. Couple are accessable, many not. In my case I would have to lubricate mixing flap actuator that is located further inside the air distribution compartment. BMW suggests removing whole dashboard to gain access... ��

BimmerSI · 03-31-2021, 01:16 AM

Someone on facebook group said that he had the same problem, but the issue was part of inner filter was loose or broken... So in 5k km I need to change all filters and will check it out then... If noise will still be present I will lubricate motors that are accessabe and go from there...

CatalinP · 03-31-2021, 04:30 AM

Replacing any of the filters takes about 5 minutes. There are DIY guides available on this forum.
You said it drives you crazy but now you will wait another 5000 km...

BimmerSI · 04-01-2021, 03:49 AM

There is airbag under the glovebox that i need to remove. Meaning that I have to disconnect battery first.... I need to organize and try it out... Somehow I do not feel comfortable doing that although is is staight forward... Thanx for the push... Will try it out.

CatalinP · 04-01-2021, 07:38 AM

You don't need to remove any airbag...

BimmerSI · 04-01-2021, 01:42 PM

Quote:

Originally Posted by CatalinP

You don't need to remove any airbag...

I did it! Removed the trim, glovebox and found the troubling motor. In is nr.4, the one on the side pannel behind climate control. I lubricated around thw shaft and on motor. Unfortunaly noise did not disapear.
Now, it might the problem in motor, which I will test in next days. If the problem is in the shaft inside the vent there is not much I can do, because it can not be removed and lube only gets in partialy from the side...

[IMG][/IMG]

trogers · 02-15-2022, 06:14 PM

Quote:

Originally Posted by BimmerSI

I did it! Removed the trim, glovebox and found the troubling motor. In is nr.4, the one on the side pannel behind climate control. I lubricated around thw shaft and on motor. Unfortunaly noise did not disapear.
Now, it might the problem in motor, which I will test in next days. If the problem is in the shaft inside the vent there is not much I can do, because it can not be removed and lube only gets in partialy from the side...

[IMG][/IMG]

Hello. Did you have any luck getting the noise to stop or at least minimize it?

astonishingmatt · 02-16-2022, 10:48 AM

FWIW, I have an F30 that had the same issue - tiny squeaks that happened whenever I hit rough road coming through the main AC vent.

My wife couldn't hear it, or chose to ignore it, but it literally drove me insane.

After a service where they replaced the filters, the noise stopped. So guessing it probably works all around.

03-30-2021, 02:35 AM	#1
BimmerSI Private 30 Rep 60 Posts Drives: F15 xdrive30d, F10 520d, i3 Join Date: Jun 2017 Location: Slovenia iTrader: (0)	AC main flap noise Hi guys! I need your help finding out a way to lubricate a main IHKA vent flap. It is the one that opens and closes when you start the car and when it goes to sleep. It changes also when moving right temp slider and it makes some fine adjustments on its own... I believe it is the flap for outside are circulation. Would it be possible to access with a long staw and inject some silicone grease to the rubber or something? It drives me crazy. Not that first time it opens but that mini adjustments that creaks all the time in the vent when it moves during the driving. Thanx for you help. Really appreciate it. Take care, BimmerSI https://vimeo.com/530672860 https://youtu.be/EOib6wuPAUA Last edited by BimmerSI; 03-30-2021 at 02:51 AM..
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03-30-2021, 09:10 AM	#2
BimmerSI Private 30 Rep 60 Posts Drives: F15 xdrive30d, F10 520d, i3 Join Date: Jun 2017 Location: Slovenia iTrader: (0)	Well I managed to dig into this a little further. BMW is actualy aware of this issue and recommends lubrication of stratification motors. The problem is that car has several flap motors. Couple are accessable, many not. In my case I would have to lubricate mixing flap actuator that is located further inside the air distribution compartment. BMW suggests removing whole dashboard to gain access... ��
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03-31-2021, 01:16 AM	#3
BimmerSI Private 30 Rep 60 Posts Drives: F15 xdrive30d, F10 520d, i3 Join Date: Jun 2017 Location: Slovenia iTrader: (0)	Someone on facebook group said that he had the same problem, but the issue was part of inner filter was loose or broken... So in 5k km I need to change all filters and will check it out then... If noise will still be present I will lubricate motors that are accessabe and go from there...
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03-31-2021, 04:30 AM	#4
CatalinP Major 591 Rep 1,270 Posts Drives: BMW X5 F15 2014 3.0xd Join Date: Aug 2017 Location: RO iTrader: (0)	Replacing any of the filters takes about 5 minutes. There are DIY guides available on this forum. You said it drives you crazy but now you will wait another 5000 km...
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04-01-2021, 03:49 AM	#5
BimmerSI Private 30 Rep 60 Posts Drives: F15 xdrive30d, F10 520d, i3 Join Date: Jun 2017 Location: Slovenia iTrader: (0)	There is airbag under the glovebox that i need to remove. Meaning that I have to disconnect battery first.... I need to organize and try it out... Somehow I do not feel comfortable doing that although is is staight forward... Thanx for the push... Will try it out.
	Appreciate 0 Quote

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AC main flap noise

04-01-2021, 07:38 AM	#6
CatalinP Major 591 Rep 1,270 Posts Drives: BMW X5 F15 2014 3.0xd Join Date: Aug 2017 Location: RO iTrader: (0)	You don't need to remove any airbag...
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02-16-2022, 10:48 AM	#9
astonishingmatt New Member 0 Rep 25 Posts Drives: 2018 BMW F15, 2014 BMW F30 Join Date: Feb 2022 Location: Boston iTrader: (0)	FWIW, I have an F30 that had the same issue - tiny squeaks that happened whenever I hit rough road coming through the main AC vent. My wife couldn't hear it, or chose to ignore it, but it literally drove me insane. After a service where they replaced the filters, the noise stopped. So guessing it probably works all around.
	Appreciate 0 Quote