a/c - dash center vent wheel noise?

[bosanci28]

i notice on my 2003 x5 4.6 , when i turn the a/c the dash center vent ,behind it i hear like a wheel noise,it does off and on,when it does that noise ,if i turn the a/c off it stops!,

is it something i need to change ?

anyone had this problem? before ? how you fixed it ?

thank you,
misu

[racingbmwm3]

There is a fan inside the HVAC control that sucks air into those little vents on the face. This is to measure the interior air temperature. There should be a thread on here for removing the control unit then removing and cleaning the fans. I think the fans are also replaceable if cleaning doesn't fix it.

[TiAgX5]

It's called the sampler fan.

[bosanci28]

hi,

and thank you to all for the info provided!

any chance you know the part number of that in case if i need to replace it?

will research it also,


thank you!
regards.