United Bimmer Community - BMW Forum - View Single Post - Whirring sound in dash after ignition turned off

**max79** · 03-09-2008, 01:33 PM

first you have to chk the climate control fan (small one ), its job is to reduce the temp of climate control and it keep running when you switch off the car until the temp of climate control reduced
and if the noise comes only when you open the AC fan thats really big job, maybe the fan bearing is bad or plastic cover is not fixed properly , so u can chk it from the engine side (out side ), and you have to be Careful coz if you mis with the plastic cover you have to remove entire dash and then the heater core to fix it ?????? i did that at home and it took from me 2 days to make it,
also when you turn on the AC you can hear some noise ( motor noise) from heater core thats happen when the ventilations open (levers inside the core), so its normal but it happen once not all the time ... good Luck

note after u switch off the car a noise comes from the core that coz the out side levers closed and all levers return back

03-09-2008, 01:33 PM	#2
max79 Name: max79 Title: Member Status: Offline Join Date: Dec 2007 Location: earth Rate My Car: 195 / 340 Your Ride: E38 1998 740i	first you have to chk the climate control fan (small one ), its job is to reduce the temp of climate control and it keep running when you switch off the car until the temp of climate control reduced and if the noise comes only when you open the AC fan thats really big job, maybe the fan bearing is bad or plastic cover is not fixed properly , so u can chk it from the engine side (out side ), and you have to be Careful coz if you mis with the plastic cover you have to remove entire dash and then the heater core to fix it ?????? i did that at home and it took from me 2 days to make it, also when you turn on the AC you can hear some noise ( motor noise) from heater core thats happen when the ventilations open (levers inside the core), so its normal but it happen once not all the time ... good Luck note after u switch off the car a noise comes from the core that coz the out side levers closed and all levers return back __________________ 740i Last edited by max79; 03-09-2008 at 01:42 PM..