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  #1  
Old 02-19-2008, 05:15 PM
dlite922 dlite922 is offline
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Location: Denver
 
Join Date: Feb 2008
Posts: 18
Mein Auto: E38
Question Heater AC fan not working

96 E38

Don't know if its related or not, but here's a history on the problems i've been having.

The ABS/ASC Failed, in snow days, after weeks of parked, it works now. Had a coolant leak in a hose in the rear of the engine, fixed yesterday.

Since that snowy day (or a few days before it) my interior heater blower stopped working, first instinct, checked the fuse, but the fuse is okay.

Sunroof stopped working too. (don't know when it stopped, if at all electronically related)

Everything in the climate control console works fine. Its as if the system does not know its not blowing any air.

I REALLY don't wanna have to replace the fan motor, but if that's my only solution, can anybody show me a DIY, i'm savvy enough with BMW and have worked on cars myself. Not a newbie.

Any other ideas. (CHeck fuses, i mean those under the hood on passenger side, looked under Heater Blower Fuse Number 23, and 32? .

Thanks for your help.
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  #2  
Old 02-19-2008, 08:05 PM
dlite922 dlite922 is offline
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Location: Denver
 
Join Date: Feb 2008
Posts: 18
Mein Auto: E38
Question

UPDATE:

ADD STEREO/COMPUTER To the List Along With Heater Blower and Sunroof

How It Happened I reset the service meter by grounding number 7 to a ground
with a paperclip (didn't work the first time)

I saw it in the forum they said put Pin 2 and 7 Together to reset it. I was
skeptical but tried it with a paper clip to see if there's spark (if there is that
means PIN 2 is not a ground) well.... it wasn't. The short spark wasn't enough
to even burn a fuse... never the less i should mention it here.

Found the other fuses in the trunk and checked those as well. no burnt fuses.

Help??


I love BMW, the several i've owned haven't given me this kind of luck. Please, i do not
wanna change my mind!
  #3  
Old 02-20-2008, 05:42 AM
AMBERROOT AMBERROOT is offline
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Location: Indiana
 
Join Date: Sep 2007
Posts: 15
Mein Auto: 93 740i
You may try cleaning the contacts on the ignition switch, or replace.

Several ppl have reported electrical gremlins which are caused by the above.

Also a consideration may be a low or dying battery, also common.

not sure if this will help, but I do hope you find the culprit
  #4  
Old 09-01-2009, 06:34 AM
Daytona_BMW Daytona_BMW is offline
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Location: Daytona Beach
 
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Posts: 98
Mein Auto: Bimmers are sold :(
Bump
  #5  
Old 09-01-2009, 11:04 AM
M.Wong's Avatar
M.Wong M.Wong is offline
E38 E91 (R56 E30 E39)
Location: Seattle WA
 
Join Date: Jan 2003
Posts: 2,323
Mein Auto: The E38
You bumped a pretty old thread. Are you having some specific problems?
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E38 2000 740iL Orient Blue
E91 2012 328xiT Alpine White

Passed on to new families:
E30 1987 325i Royal Blue
E39 2003 540i/6 Sterling Gray
R56 2010 Mini Cooper S British Racing Green


  #6  
Old 09-02-2009, 06:39 AM
Daytona_BMW Daytona_BMW is offline
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Mein Auto: Bimmers are sold :(
Well yes.. Yesterday my AC fan wouldn't start in the morning. Was not until the afternoon the fan started working again.
Now the fan is making a strange sound every now and then. Like a knocking sound for every revolution it makes.
Are there two or just one fan in the car? It has dual climate control, so it must have two fans?

I just wanted to see if the author ever figured out the problem. Don't want to start a new thread when there already is one out there.
  #7  
Old 09-02-2009, 07:56 AM
M.Wong's Avatar
M.Wong M.Wong is offline
E38 E91 (R56 E30 E39)
Location: Seattle WA
 
Join Date: Jan 2003
Posts: 2,323
Mein Auto: The E38
I recall there is a resistor people change out, but it's on the motor itself (and requires the dash removal). Noise could mean a bad fan motor. Here are two threads that might give you some insight, I think the fan is a single unit with two sides for the dual zone climate control.

Blower motor replacement post 1

Blower motor replacement post 2
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M.Wong
E38 2000 740iL Orient Blue
E91 2012 328xiT Alpine White

Passed on to new families:
E30 1987 325i Royal Blue
E39 2003 540i/6 Sterling Gray
R56 2010 Mini Cooper S British Racing Green


  #8  
Old 09-14-2009, 06:30 PM
Daytona_BMW Daytona_BMW is offline
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Mein Auto: Bimmers are sold :(
I am ready to start tearing off the dash, but i need to order some parts obviously.

So now I am wondering if it is the motor, or the blower resistor that is busted. Each part is 200 dollar each,
and I don't want to buy unnecessary parts.

But I guess it must be the fan since it has been making noise, and it used to start working again when i gave the dash a quick whip.
Since yesterday that diden't work either..

So I guess I just have to take a chance on the fan.
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  #9  
Old 09-14-2009, 08:47 PM
M.Wong's Avatar
M.Wong M.Wong is offline
E38 E91 (R56 E30 E39)
Location: Seattle WA
 
Join Date: Jan 2003
Posts: 2,323
Mein Auto: The E38
Hmmm, if I were doing all that labor, I'd replace both just to be sure I didn't have to go back and do it again!
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M.Wong
E38 2000 740iL Orient Blue
E91 2012 328xiT Alpine White

Passed on to new families:
E30 1987 325i Royal Blue
E39 2003 540i/6 Sterling Gray
R56 2010 Mini Cooper S British Racing Green


  #10  
Old 09-16-2009, 12:07 PM
Daytona_BMW Daytona_BMW is offline
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Location: Daytona Beach
 
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Mein Auto: Bimmers are sold :(
Just got a nice deal on a used fan and resistor from a 95 740. I wonder if that fan will fit?

The new OEM parts are 450 dollar, while this used one is 75 dollar.
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  #11  
Old 09-16-2009, 12:38 PM
M.Wong's Avatar
M.Wong M.Wong is offline
E38 E91 (R56 E30 E39)
Location: Seattle WA
 
Join Date: Jan 2003
Posts: 2,323
Mein Auto: The E38
You can check RealOEM to see if the part numbers are the same. Even if they are not, it might still work (part numbers update over time). But if they are the same you know it's good.

Good luck with the used parts!

LINK: http://www.realoem.com/bmw/select.do
__________________
M.Wong
E38 2000 740iL Orient Blue
E91 2012 328xiT Alpine White

Passed on to new families:
E30 1987 325i Royal Blue
E39 2003 540i/6 Sterling Gray
R56 2010 Mini Cooper S British Racing Green


 

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