E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-06-2013, 11:59 AM   #1
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Radiator Fan Intermittent

Hi Guys,

I was standing in front of my car today while it was running (normal operating temperature) adjusting the headlights and I noticed that my fan keep "flickering" on and off. Spinning for a few seconds and turning off, back and off etc.

I have no overheating issues and no check engine light...is this normal behavior for the fan?
fastsoup is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 03-06-2013, 12:19 PM   #2
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
The aux fan in the front? Might be a good time to change your lower radiator hose sensor.
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 12:27 PM   #3
shanneba
Registered User
 
Join Date: May 2008
Location: Indiana
Posts: 2,094
My Ride: 2003 330Ci
Was the A/C compressor also cycling, like maybe the defrost was on?

The A/C pressure is one of the variables the DME uses to calculate when to turn the fan on.
If the compressor ran long enough to raise the A/C pressure, it may kick on the fan, then if the compressor shuts off the pressure drops and the fan also stops.
__________________
Join BMWCCA
Discounts on new and CPO cars.
Most Dealers offer a parts discount, BMP Design 10% off

Last edited by shanneba; 03-06-2013 at 12:28 PM.
shanneba is offline   Reply With Quote
Old 03-06-2013, 12:37 PM   #4
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
I went out to take a video...


https://www.dropbox.com/s/6s1s4uoj4e...6_102927.mp4?m
fastsoup is offline   Reply With Quote
Old 03-06-2013, 12:37 PM   #5
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by shanneba View Post
Was the A/C compressor also cycling, like maybe the defrost was on?

The A/C pressure is one of the variables the DME uses to calculate when to turn the fan on.
If the compressor ran long enough to raise the A/C pressure, it may kick on the fan, then if the compressor shuts off the pressure drops and the fan also stops.
A/C is not on
fastsoup is offline   Reply With Quote
Old 03-06-2013, 12:41 PM   #6
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
Go to the hidden OBC menu and find out what the coolant temp is when the fan is doing that.
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 12:43 PM   #7
azshorty
Registered User
 
Join Date: Mar 2008
Location: the entire valley of the sun,Az
Posts: 713
My Ride: Hellrot 323CI
might be time to replace the aux fan. symptoms of it going bad. turn the a/c on and see if it operates normaly.
it should spin at low speeds when first turned on, its a self check mode it does when you first start the car.
and where your from, i dont think its warm enough to kick on on its own.
__________________
azshorty is offline   Reply With Quote
Old 03-06-2013, 12:43 PM   #8
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by Solidjake View Post
Go to the hidden OBC menu and find out what the coolant temp is when the fan is doing that.
I would love to, how do I get there?
fastsoup is offline   Reply With Quote
Old 03-06-2013, 12:46 PM   #9
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by azshorty View Post
might be time to replace the aux fan. symptoms of it going bad. turn the a/c on and see if it operates normaly.
it should spin at low speeds when first turned on, its a self check mode it does when you first start the car.
and where your from, i dont think its warm enough to kick on on its own.
Vancouver...It's about 39F outside right now. I have been running this car since June when it was 86F out. Come to think of it, I remember the fan doing the same thing the day I bought it.

With the A/C on, she spins and doesn't stop. Turned off the A/C, and back to normal behavior.

Last edited by fastsoup; 03-06-2013 at 12:51 PM.
fastsoup is offline   Reply With Quote
Old 03-06-2013, 01:00 PM   #10
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
Quote:
Originally Posted by fastsoup View Post
I would love to, how do I get there?
19, then 7.0


http://www.bimmerfest.com/wiki/index...uter_Functions
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 01:05 PM   #11
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by Solidjake View Post
??? Let's try that again, for a guy who has never accessed the On Board Computer

Last edited by fastsoup; 03-06-2013 at 01:05 PM.
fastsoup is offline   Reply With Quote
Old 03-06-2013, 01:08 PM   #12
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
Instructions are in the link. step by step

Hold the left stalk, when it flashes test keep pressing till you hit 19. When it says off, press again and keep going till you hit 7
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 01:08 PM   #13
azshorty
Registered User
 
Join Date: Mar 2008
Location: the entire valley of the sun,Az
Posts: 713
My Ride: Hellrot 323CI
this will show you how to get to the obc.
__________________

Last edited by azshorty; 03-06-2013 at 01:10 PM.
azshorty is offline   Reply With Quote
Old 03-06-2013, 01:31 PM   #14
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by Solidjake View Post
Instructions are in the link. step by step

Hold the left stalk, when it flashes test keep pressing till you hit 19. When it says off, press again and keep going till you hit 7
Sorry Jake, I didn't see the link

Do I do this with the car at normal temp and off or idle?
fastsoup is offline   Reply With Quote
Old 03-06-2013, 01:39 PM   #15
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
With the car on. I just want to know at what temp is the fan acting like that.
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 01:53 PM   #16
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by Solidjake View Post
With the car on. I just want to know at what temp is the fan acting like that.
With the car on, needle at noon, fan still doing the same thing, it read 0090

Last edited by fastsoup; 03-06-2013 at 01:54 PM.
fastsoup is offline   Reply With Quote
Old 03-06-2013, 02:15 PM   #17
Mango
A full five stars, son
 
Mango's Avatar
 
Join Date: Mar 2006
Location: Southern California
Posts: 22,807
My Ride: M54B30
i've seen someones auto 330ci do this before. it was strange. it flickers on and off regardless of operating temp. never gets to full/operational speed, just briefly spins for a second then stops. then starts then stops. you can't hear it
__________________
A lifetime free of problems if you follow my guides
Cooling | Maintenance | Suspension | Vacuum | Supreme Reliability | Details

OVER A MILLION VIEWS
Mango is offline   Reply With Quote
Old 03-06-2013, 02:20 PM   #18
Solidjake
Zero. Oil. Leaks.
 
Solidjake's Avatar
 
Join Date: May 2008
Location: NYC
Posts: 22,384
My Ride: 2002 330i
At 90C it shouldn't be running imo. Change that lower radiator hose sensor first. If it persists we'll go from there. Sensor is cheap

13621433077
__________________
WTB FACELIFT SEDAN TITANIUM SILVER DRIVERS FENDER

Youtube - Electric Fan Swap - Projector Retrofit - Bulb Guide - NY to LA cross country
Solidjake is offline   Reply With Quote
Old 03-06-2013, 02:24 PM   #19
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by Solidjake View Post
At 90C it shouldn't be running imo. Change that lower radiator hose sensor first. If it persists we'll go from there. Sensor is cheap

13621433077
Sounds good...I will try and get that done pronto. Thanks a lot Jake!
fastsoup is offline   Reply With Quote
Old 03-06-2013, 02:26 PM   #20
fastsoup
Registered User
 
Join Date: Apr 2012
Location: Vancouver
Posts: 235
My Ride: currently seeking
Quote:
Originally Posted by E46Mango View Post
i've seen someones auto 330ci do this before. it was strange. it flickers on and off regardless of operating temp. never gets to full/operational speed, just briefly spins for a second then stops. then starts then stops. you can't hear it
Yeah I am going to monitor it and check it when I get home tonight, after a 50km drive and see if it's still doing the same thing. Its fully spinning with the A/C turned on; correct, you cannot hear a thing.
fastsoup is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is ON





All times are GMT -5. The time now is 02:46 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use