Noise from Heater...
 

Hello Everyone...

I have 2001 3.0. It’s been great until few weeks ago…

I've been hearing couple of weird noises every time I turn on my heater (after vehicle is warmed up)

Noise is in low tones and only way you can hear it is when you are standing still.


1st noise... I hear fan humming noise. It sounds like someone is cutting a wood with chain saw in far distance.

2nd noise... I hear continues double thumping noise just like a heartbeat. To describe thumping noise, it a sound when you change fan setting from Dash Vent to Floor Vent. (That thumping & cracking noise when it changes the Vent)

I only hear these noises when I turn on the Heater. I hear the noise if I turn on the A/C as well...

Recently I changed A/C fan belts and problem was there even before I changed them.



Any one has same experience...?

Any suggestions or help will be appreciated....

Similar Issue
 

:dunno: Wish I could help with you're issue... I have one like it. After X is warm the blower motor makes a squeel noise like belt slipping. Slow the blower motor down the noise goes down. Turn it off the noise goes away. It only does it in heat. Turn A/C on and all is quiet.

2003 3.0i, 117,000 miles... runs great, all OEM no MODS.

1,The fan humming noise is bad FSR.
2,Bad blower motor makes a squeel noise like belt slipping

Exactly..Its your Final Stage Resistor (FSR)..

IC... I'll get these checked out...

Thanks guys..

I have the same model X5 and mine has just recently started doing this!

"2nd noise... I hear continues double thumping noise just like a heartbeat. To describe thumping noise, it a sound when you change fan setting from Dash Vent to Floor Vent. (That thumping & cracking noise when it changes the Vent)"

It is only on when the heat or a/c is on, if i turn it off completly it is gone. It sounds like it is coming from the middle center vent, but hard to hear.

Any ideas? It can't be FSR as i replaced that 2 years ago with the updated p/n.

my blower fan squealed for a few seconds and then stopped completely .
new fan blower and fsr will cost £400 fitted at a BMW dealer . 5 hour job .
diy parts will cost around £100 , take more than 5 hours , entire dashboard and centre console needs to be removed .
dealer is the easier option , don`t mess about with winter upon us .

sbahng , maybe your fsr is the only problem .

could this be covered by CPO warranty?
FSR might not but how about the HVAC thumping or blower motor?

warranty covered my repairs , blower motor and fsr .

If you are lucky its the FSR. But if you are getting the squeal or humming noise is the blower motor starting to die. I just replaced mine and I would say its' a 6-7 hour job, but I could do it in 4-5 now. Not that difficult but tedious. There is alot of things that have to be removed. A bentley manual is a must. If this scares you don't even try. I replaced mine on Monday.