Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 09-23-2008, 10:07 PM
makaveddie81 makaveddie81 is offline
Registered User
Location: California
 
Join Date: Sep 2008
Posts: 7
Mein Auto: 1995 325i
Smile Auxiliary fan not working when AC on, but works when temp is high

My auxiliary fan is not working when I turn on my AC. The snowflake button light does light up green but I get no cold air (I do get air, but not cold air). The weird thing is that the auxiliary fan does work whenever the the temp gets hot. Any idea what may be causing this? It's scorching hot here in Cali and I need my AC

Thanks!
Reply With Quote
Ads by Google
  #2  
Old 09-24-2008, 02:34 AM
Pirate_copy's Avatar
Pirate_copy Pirate_copy is offline
Still here
Location: Devon, UK
 
Join Date: May 2006
Posts: 12,180
Send a message via MSN to Pirate_copy
Mein Auto: M3
Get your AC system checked

Is it gassed and the compressor kicking in?
__________________
330i M-Sport in Topaz Blue

Edirty6 for life
Reply With Quote
  #3  
Old 09-24-2008, 06:02 AM
Soviet1942's Avatar
Soviet1942 Soviet1942 is offline
Zinnobitch
Location: Miami, FL
 
Join Date: Sep 2007
Posts: 577
Send a message via AIM to Soviet1942 Send a message via MSN to Soviet1942 Send a message via Skype™ to Soviet1942
Mein Auto: 1987 325is
I kind of have the same issue, my aux fan does not turn on when I have my air on but I DO get cold air. My air is really cold but the aux fan never turns on. My temp has always been dead on in the middle. Any ideas?
Reply With Quote
  #4  
Old 09-24-2008, 08:13 AM
dwvcfii dwvcfii is offline
Registered User
Location: NJ, USA
 
Join Date: Jul 2007
Posts: 8
Mein Auto: 98 328is, 06 330ci ZHP
Quote:
Originally Posted by makaveddie81 View Post
My auxiliary fan is not working when I turn on my AC. The snowflake button light does light up green but I get no cold air (I do get air, but not cold air). The weird thing is that the auxiliary fan does work whenever the the temp gets hot. Any idea what may be causing this? It's scorching hot here in Cali and I need my AC

Thanks!
Low speed fan relay. It's a $20 part. DIY.

FYI - disable A/C (turn off snowflake button) if cruising below ~20 MPH with the aux fan inop. The high pressure that results from low / no airflow over the condenser will eventually damage the compressor.

-Doug
__________________
'98 E36 328is
'06 E46 330ci ZHP
http://www.dvatp.com/
Reply With Quote
  #5  
Old 09-24-2008, 06:30 PM
makaveddie81 makaveddie81 is offline
Registered User
Location: California
 
Join Date: Sep 2008
Posts: 7
Mein Auto: 1995 325i
Quote:
Originally Posted by Pirate_copy View Post
Get your AC system checked

Is it gassed and the compressor kicking in?
How do I know if the compressor is kicking in? Any particular noise I should be paying attention to?
Reply With Quote
  #6  
Old 09-24-2008, 06:32 PM
makaveddie81 makaveddie81 is offline
Registered User
Location: California
 
Join Date: Sep 2008
Posts: 7
Mein Auto: 1995 325i
Quote:
Originally Posted by dwvcfii View Post
Low speed fan relay. It's a $20 part. DIY.

FYI - disable A/C (turn off snowflake button) if cruising below ~20 MPH with the aux fan inop. The high pressure that results from low / no airflow over the condenser will eventually damage the compressor.

-Doug
So the aux fan operation is not dependent on the condition of the ac compressor? I've read something about fuse 39 having to do something with it.
Reply With Quote
  #7  
Old 09-24-2008, 10:45 PM
Soviet1942's Avatar
Soviet1942 Soviet1942 is offline
Zinnobitch
Location: Miami, FL
 
Join Date: Sep 2007
Posts: 577
Send a message via AIM to Soviet1942 Send a message via MSN to Soviet1942 Send a message via Skype™ to Soviet1942
Mein Auto: 1987 325is
Quote:
Originally Posted by makaveddie81 View Post
So the aux fan operation is not dependent on the condition of the ac compressor? I've read something about fuse 39 having to do something with it.
Do you know the part number for this relay? I am looking on realoem but I can't find a description.

http://www.realoem.com/bmw/partgrp.d...98&hg=61&fg=25


What does fuse 39 do?
Reply With Quote
  #8  
Old 09-25-2008, 12:31 AM
makaveddie81 makaveddie81 is offline
Registered User
Location: California
 
Join Date: Sep 2008
Posts: 7
Mein Auto: 1995 325i
I dont remember exactly where I read it but its either fuse 31 or 39 and it has something to do with the a/c or aux fan...
Reply With Quote
  #9  
Old 09-29-2008, 06:39 AM
Soviet1942's Avatar
Soviet1942 Soviet1942 is offline
Zinnobitch
Location: Miami, FL
 
Join Date: Sep 2007
Posts: 577
Send a message via AIM to Soviet1942 Send a message via MSN to Soviet1942 Send a message via Skype™ to Soviet1942
Mein Auto: 1987 325is
I just looked at my aux fan, man that **** is retarded. I guess the person that had it before me before to rig with it and I have a relay that connects to my aux fan zip tied near my compressor.

I am guessing that it has gotten wet a couple of times and is now failing. Could that be the issue? Would it be a smart idea to just get a switch for my aux fan and rewire it all or should I replace that relay?
Reply With Quote
  #10  
Old 09-29-2008, 07:18 AM
dwvcfii dwvcfii is offline
Registered User
Location: NJ, USA
 
Join Date: Jul 2007
Posts: 8
Mein Auto: 98 328is, 06 330ci ZHP
Quote:
Originally Posted by Soviet1942 View Post
I just looked at my aux fan, man that **** is retarded. I guess the person that had it before me before to rig with it and I have a relay that connects to my aux fan zip tied near my compressor.
I recommend restoring the car to the original working order.

Here are some older entries in my blog about troubleshooting and replacing the original relay (located in the fuse box):

http://www.dvatp.com/bmw/maintenance/e36/2006/07/25/
http://www.dvatp.com/bmw/maintenance/e36/2006/08/08/

I should point out that the troubleshooting in the first entry was simply to determine if the fan itself was bad. The fan ran in low and high speed modes when I troubleshooted it, but only because I was getting lucky -- the relay contacts were intermittent. I didn't know that at the time. My tech later diagnosed it as a bad relay because he had seen this many times and took the relay apart to verify the problem.

If you are going to replace the relay, I recommend you replace both low and high speed units. While the low speed relay takes all the abuse and tends to fail first, the high speed relay is critical if you live in a warm climate or do lots of city (stop/go) driving.

-Doug
__________________
'98 E36 328is
'06 E46 330ci ZHP
http://www.dvatp.com/

Last edited by dwvcfii; 09-29-2008 at 07:26 AM.
Reply With Quote
  #11  
Old 10-18-2008, 06:50 PM
dwvcfii dwvcfii is offline
Registered User
Location: NJ, USA
 
Join Date: Jul 2007
Posts: 8
Mein Auto: 98 328is, 06 330ci ZHP
Quote:
Originally Posted by Soviet1942 View Post
Do you know the part number for this relay? I am looking on realoem but I can't find a description.

http://www.realoem.com/bmw/partgrp.d...98&hg=61&fg=25
BMW Part 61361389105

-Doug
__________________
'98 E36 328is
'06 E46 330ci ZHP
http://www.dvatp.com/
Reply With Quote
  #12  
Old 08-14-2010, 11:07 AM
fatalrhymer fatalrhymer is offline
Registered User
Location: belgium
 
Join Date: Aug 2010
Posts: 1
Mein Auto: e46 320d
Hi,

I'm from Belgium.
I drive with a e46 320d automatic 2004.

I have similar problem like above but different.

When i put on A/C , i see and hear the fan turn, but when temp outside is hot ( even when very hot!), the fan doesnt turns! The temperaturemeter in dashboard stays in middle, doesnt go to red.

Most of the cars that stays on red traffic light near me have turning/blowing fans, but fan of my car doesnt nothing!! Only if i put on the A/C.

Who knows whats the possible problem.

Thank you.
Reply With Quote
  #13  
Old 06-26-2011, 03:16 PM
momo_oo[][]oo's Avatar
momo_oo[][]oo momo_oo[][]oo is offline
Officially Welcomed to the 'Fest
Location: ca
 
Join Date: May 2007
Posts: 1,996
Mein Auto: M35
Old thread but I was wondering if some one can guide me through , I just got my cooling system overhaul done with no fan change. The temp gauge go further more than the middle with a
A/C on once I turn it off the temp gauge back in the middle. Is it fan issue, do I need to change it or it's possibly relay and fuses? Any help would be appreciated be fire I spend money on a part that's not the issue.
Thanks
__________________
03 GSX-R 1000
06 Infiniti M35
00 E46 323I SOLD
08 Jeep Grand Cherokee Laredo SOLD
08 E60 535I LEASE OVER
02 E66 745LI LEMON
98 E39 528I SOLD
91 E30 316I SOLD
Reply With Quote
  #14  
Old 06-29-2011, 03:37 PM
ethereal45's Avatar
ethereal45 ethereal45 is offline
Officially Welcomed to the 'Fest
Location: Lincoln, NE
 
Join Date: Jan 2011
Posts: 510
Send a message via AIM to ethereal45
Mein Auto: 1998 328i
Quote:
Originally Posted by momo_oo[][]oo View Post
Old thread but I was wondering if some one can guide me through , I just got my cooling system overhaul done with no fan change. The temp gauge go further more than the middle with a
A/C on once I turn it off the temp gauge back in the middle. Is it fan issue, do I need to change it or it's possibly relay and fuses? Any help would be appreciated be fire I spend money on a part that's not the issue.
Thanks
I would 1) rebleed the cooling system just to make sure you have all the air out

2) Check and ensure the aux fan is spinning when you have the AC on. Does the fan spin when you don't have the AC on?

If you didn't have this problem before, then it's likely something you did in the process of your cooling system, as it should work better now, and not worse. If you didn't touch the fan or the relays, they shouldn't be working any better or worse than they were before your cooling system job.
__________________

1998 328i
Koni Sport Suspension
Reply With Quote
  #15  
Old 10-03-2011, 01:13 PM
pembrokedre27 pembrokedre27 is offline
Registered User
Location: New Hampshire
 
Join Date: Oct 2011
Posts: 18
Mein Auto: 1992 325i
Need some help with this!

I know this is an old thread, but figured I'd hit this before trying a new one.
Here's the situation. I found that my aux fan isn't turning on with the AC, so I tested the unit by grounding the high and low speed seperatley to the temp. switch to see if the fan is still good. I believe the high speed is working as it kicked on when grounded, haven't had any overheat issues. Couldn't get the low speed to kick on when testing with ground to temp. switch. Heard the click at the relay box when grounded out though. So, I figured it was the low speed relay for the fan, replaced it with a used one that was from a working unit. Turned the AC on and waited for the fan to kick in, didn't happen. I wondering if anyone can help with any info on this. I'm at the end of my rope. Thanks in advance for any assistance.
Reply With Quote
  #16  
Old 10-03-2011, 01:26 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,528
Mein Auto: 1998 BMW 328is
Sounds exactly like a faulty low-speed relay. Mine did the same thing, and it was in fact the low-speed relay. Are you positive that the relay you swapped with is a functional unit? Did you try swapping your high-speed relay into the low-speed relay location?
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
Reply With Quote
  #17  
Old 10-03-2011, 02:39 PM
pembrokedre27 pembrokedre27 is offline
Registered User
Location: New Hampshire
 
Join Date: Oct 2011
Posts: 18
Mein Auto: 1992 325i
Well, I'm thiking it may be the high speed now, but I'm not sure. I tested the circuits from the fan by grounding each. One turns the fan on, the other didn't. Can't tell by speed wether it's the high or low that is running. So, I'm guessing the fan itself is fine. I went and got the low speed relay, used, but it was actually a different part number than what is in my car. I previously had the same relay (same part number) in the AC compressor and low speed relay slots. The compressor runs fine, so that pushed me toward the low speed relay being the issue. But when I swap the relays from the compressor and the low speed fan (same part #), the compressor runs with both relays. So, I'm guessing that both the AC and low speed relays are fine, and it may actually be the high speed relay that is crap.
Reply With Quote
  #18  
Old 02-10-2012, 02:00 PM
ciborgman ciborgman is offline
Officially Welcomed to the 'Fest
Location: Texas
 
Join Date: Jun 2007
Posts: 168
Mein Auto: 2002, 325I
sorry to revive this old thread, I have a issue myself too but in this case the fan always run at high speed right after I star the engine.. I am thinking is a relay but then the fan should not spin at all
Reply With Quote
  #19  
Old 02-10-2012, 02:20 PM
ZeGerman's Avatar
ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
 
Join Date: Mar 2009
Posts: 18,528
Mein Auto: 1998 BMW 328is
Yes, check your relays. You have two: one for low-speed, and one for high-speed, and they are located in the black box under the hood, near the firewall, on the drivers side. Normally, the auxiliary fan does not turn on unless A) you have your A/C turned on (and your A/C system is working properly), or B) it's a very hot day outside. The A/C and warmer temps will kick on the low-speed setting. I can't imagine anything short of racing or a desert triggering the high-speed setting. I've driven my car in 103 degree heat and the high-speed setting never kicked in, and know my relays work because I tested them. Your aux fan shouldn't be engaging at all during start-up unless you have your A/C turned on, and even then, it should be the low-speed setting at that point.
__________________

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 02-10-2012 at 02:21 PM.
Reply With Quote
  #20  
Old 06-24-2014, 12:43 PM
bobsy852 bobsy852 is offline
Registered User
Location: Blackburn
 
Join Date: Jan 2010
Posts: 2
Mein Auto: BMW E36-wish for E34 tou
Hi all,

I know this is an old thread but I'm trying to solve a similar issue on my E36:

Car hasn't been properly used for some months. I tested the air-con every month or so and it worked fine. Got the car back on the road this week and the air con doesn't blow cold, and the aux fan doesn't kick in. Last year I replaced the aux fan so I'm 95% sure that should still be working. I've also replaced the final stage resistor too recently.

If I test the fan at the speed switch on the side of the radiator, will it still work even if the relays are broken?

IF the pressure in the air-con system is low will the fan kick in when I press the ice button on the climate control unit?
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 12:31 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms