My 2004 convertible 330ci is making weird "cricket" noise when ac on

Rlp951 · 10-21-2012, 12:39 AM

My car chirps when not moving either ac on or off, the higher the ac, the loder the chirp, any opinions to what it is? Please help, im goin crazy, short on cash for mechanic

R1200RT · 10-21-2012, 07:49 AM

My vote is for belt or idler for your AC compressor, also possibly a bearing on the compressor.

vilseck21 · 10-21-2012, 12:51 PM

Could be your blower motor is wearing

Nickvjr · 10-23-2012, 01:16 AM

My vote is for the blower motor going out / bearings squeaking.

Here is why... A change in AC Blower speed changes the chirp which means the 'blower motor'. If it was the belts or AC Clutch then the force of the air blowing into the cabin wouldn't change the pitch of the chirp cause the belts & clutches spin at RPM speed not blower motor speed.

There is a great DIY on blower motor replacement! Good Luck!

Chilton88 · 10-26-2012, 11:14 PM

How come if I turn up the fan and keep the a/c off, the noise goes away. It is only occurring when the a/c is on -). Also when I turn on the a/c there is a growling noise. Is it the compressor?

lucky_doggg7 · 10-27-2012, 03:15 AM

http://forum.e46fanatics.com/showthread.php?t=832859

There is an ECU fan right above the footrest; it's making a chirping sound to indicate that the useful life of the fan is coming to an end. To verify, get down in driver footwell, after you adjust the seat fully back; pull the carpeting back for better viewing just to make sure and listen for the little birdie (chirping sound). This is a well documented issue with the M3 also, so don't feel singled out. See the attached post.

cityjohn · 10-27-2012, 03:50 AM

Quote:

Originally Posted by Rlp951

My 2004 convertible 330ci is making weird "cricket" noise when ac on

Check the front passenger seat for DMAX doing his routine

dmax · 10-27-2012, 06:15 AM

If you're lucky, dmax will have his hose with him and help you isolate the source of your chirping...he'd probably check AC compressor first if I know him. He's not that funny...so you're better with his hose, if you know what I mean?

cityjohn · 10-27-2012, 06:29 AM

Doug to the rescue!

10-21-2012, 12:39 AM	#1
Rlp951 Registered User Join Date: Oct 2012 Location: Mission tx. Posts: 1 My Ride: Red Bmw 330ci 2004 View My Garage	My 2004 convertible 330ci is making weird "cricket" noise when ac on My car chirps when not moving either ac on or off, the higher the ac, the loder the chirp, any opinions to what it is? Please help, im goin crazy, short on cash for mechanic Last edited by Rlp951; 10-21-2012 at 02:06 AM.

10-21-2012, 07:49 AM	#2
R1200RT Registered User Join Date: May 2010 Location: Southern Ontario, Canada Posts: 315 My Ride: 2004 330CIC View My Garage	My vote is for belt or idler for your AC compressor, also possibly a bearing on the compressor. __________________ Nick '04 330CIC, 3 pedals, M Sports\Aerodynamics Packages '05 BMW R1200RT '00 BMW R1100S '01 BMW R1200C Phoenix '95 BMW R100R Classic

10-23-2012, 01:16 AM	#4
Nickvjr Registered User Join Date: Nov 2011 Location: Prescott, AZ Posts: 170 My Ride: 2004 330Ci Conv. View My Garage	My vote is for the blower motor going out / bearings squeaking. Here is why... A change in AC Blower speed changes the chirp which means the 'blower motor'. If it was the belts or AC Clutch then the force of the air blowing into the cabin wouldn't change the pitch of the chirp cause the belts & clutches spin at RPM speed not blower motor speed. There is a great DIY on blower motor replacement! Good Luck! __________________ -Nickvjr 2004 BMW 330Ci Convertible

10-27-2012, 06:15 AM	#8
dmax Stay stock my friends! Join Date: Aug 2006 Location: Unit I Posts: 21,163 My Ride: '99 328i 1.03809 mu View My Garage	If you're lucky, dmax will have his hose with him and help you isolate the source of your chirping...he'd probably check AC compressor first if I know him. He's not that funny...so you're better with his hose, if you know what I mean? __________________ This huge woman, like 400 pounds comes up to me and says, "Doug, I would rock your world." I replied, "but I need to breathe." The girl in my sig:http://forum.e46fanatics.com/showthr...highlight=dmax

10-27-2012, 06:29 AM	#9
cityjohn Registered User Join Date: Nov 2007 Location: Los Angeles Posts: 1,680 My Ride: 2001 M3 View My Garage	Doug to the rescue! __________________

10-21-2012, 12:51 PM	#3
vilseck21 Registered User Join Date: Jul 2011 Location: In La La Land Posts: 203 My Ride: B_Cryus's mother View My Garage	Could be your blower motor is wearing

10-26-2012, 11:14 PM	#5
Chilton88 Registered User Join Date: May 2012 Location: San Diego, CA Posts: 47 My Ride: 325ci, 325xi View My Garage	How come if I turn up the fan and keep the a/c off, the noise goes away. It is only occurring when the a/c is on -). Also when I turn on the a/c there is a growling noise. Is it the compressor?

10-27-2012, 03:15 AM	#6
lucky_doggg7 Registered User Join Date: Mar 2008 Location: OC Posts: 282 My Ride: 2005 M3 View My Garage	http://forum.e46fanatics.com/showthread.php?t=832859 There is an ECU fan right above the footrest; it's making a chirping sound to indicate that the useful life of the fan is coming to an end. To verify, get down in driver footwell, after you adjust the seat fully back; pull the carpeting back for better viewing just to make sure and listen for the little birdie (chirping sound). This is a well documented issue with the M3 also, so don't feel singled out. See the attached post.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode	Rate This Thread: