[cn555ic]

I was cleaning out my glovebox and noticed the ecu cooling fan blowing constantly once the car was warmed up fully...Once I noticed this, the last few days I have been bugging out hearing the noise of the cooling fan from the ecu box, I guess its a selective hearing thing that I got going on! Anyway is the cooling fan from the ecu suppose to stay on constantly or is it suppose to intermittenly turn on and off...If its suppose to turn on and off, then I have a really issue and I am not bugging out...Can anyone tell me if your car is also doing the same...Thanks

Its part number 5 on the diagram

[samchoi604]

Can you describe the sound? Is it like a buzzing sound coming from inside the dash? If so, I hear this all the time when the car is warm and have been wondering where the hell it's coming from!!! I guess this answers that

[cn555ic]

Originally Posted by samchoi604

Can you describe the sound? Is it like a buzzing sound coming from inside the dash? If so, I hear this all the time when the car is warm and have been wondering where the hell it's coming from!!! I guess this answers that

Yes thats it! Open your glovebox and stick your ear towards the direction of the glovebox and you can hear a fan blowing and buzzes and hums...When the engine is cold its not on but once the car is fully warmed in my car the fan turns on and never shuts off...Now that I hear it I have selective hearing I guess OCD syndrome and its making me bug out, but if its normal I guess I am tripping! Need to know if its suppose to stay on without ever shutting off

[samchoi604]

Originally Posted by cn555ic

Yes thats it! Open your glovebox and you can hear a fan blowing and buzzes and hums...When the engine is cold its not on but once the car is fully warmed in my car the fan turns on and never shuts off...Now that I hear it I have selective hearing I guess OCD syndrome and its making me bug out, but if its normal I guess I am tripping!

Ok, I will try to hear it from the glove box next time. For me, it is a very noticeable annoying sound, especially when the AC and radio is off. It happens when the car is warmed up, not during cold start. I never would have guessed it is the ECU fan.

[ruphianh]

Originally Posted by cn555ic

Yes thats it! Open your glovebox and you can hear a fan blowing and buzzes and hums...When the engine is cold its not on but once the car is fully warmed in my car the fan turns on and never shuts off...Now that I hear it I have selective hearing I guess OCD syndrome and its making me bug out, but if its normal I guess I am tripping!

I installed a water spray bar on my ecu to keep it cool. I think its going to work great.

I put the water tank in my glovebox with a small line running to a nozzle that i duct taped on my ecu.

I have this red button that activates a small pump to spray water on my ecu.

I haven't tried it out yet, but I have a feeling when I hit the red button, it will make the fan stop spinning, eliminating the noise.

Its like water/meth for intake temps, except better. Spray water on your ECU and the fan shuts off.

[cn555ic]

Originally Posted by ruphianh

I installed a water spray bar on my ecu to keep it cool. I think its going to work great.

I put the water tank in my glovebox with a small line running to a nozzle that i duct taped on my ecu.

I have this red button that activates a small pump to spray water on my ecu.

I haven't tried it out yet, but I have a feeling when I hit the red button, it will make the fan stop spinning, eliminating the noise.

Its like water/meth for intake temps, except better. Spray water on your ECU and the fan shuts off.

Trying to be funny my friend but your not!
Corny jokes if you ask me man

Looking for answers and you come up with this..

[ruphianh]

Originally Posted by cn555ic

Trying to be funny my friend but your not!
Corny jokes if you ask me man

I just pressed the red button and the fan turned off. Problem solved.

[samchoi604]

Originally Posted by ruphianh

I installed a water spray bar on my ecu to keep it cool. I think its going to work great.

I put the water tank in my glovebox with a small line running to a nozzle that i duct taped on my ecu.

I have this red button that activates a small pump to spray water on my ecu.

I haven't tried it out yet, but I have a feeling when I hit the red button, it will make the fan stop spinning, eliminating the noise.

Its like water/meth for intake temps, except better. Spray water on your ECU and the fan shuts off.

Originally Posted by cn555ic

Trying to be funny my friend but your not!
Corny jokes if you ask me man

Looking for answers and you come up with this..

ROFL

[ruphianh]

Originally Posted by samchoi604

ROFL

DIY to follow.

[cn555ic]

Originally Posted by ruphianh

DIY to follow.

Cool you got your laugh now...What are we like 5 years old! Cmon man just leave the thread be if you dont have some answers...Are you that bored?

[Beemw335]

Mine comes on when the car is warm and stays on until shut off.

[Brey335i]

I can't hear mine (probably courtesy of Vanguard + AR). But I have heard it in my buddy's car for a while and I could swear it turned on and off IIRC. This was about a year and a half ago and I haven't heard him mention any work or problems related to the ECU cooling fan. Sorry I don't have a definite answer for you.

P.S. lol @ the water injection joke

[JamesM3M5]

Originally Posted by cn555ic

Cool you got your laugh now...What are we like 5 years old! Cmon man just leave the thread be if you dont have some answers...Are you that bored?

Oh come on, it was funny, and not directly at your expense.

BMW has been doing this for years. Many come with an "E-box" fan. It will even set a code in the ECU if it fails. There is either a sensor inside the box or built into the ECU board (depending on model / year) to monitor temps, and it runs automatically.

[cn555ic]

Originally Posted by Brey335i

I can't hear mine (probably courtesy of Vanguard + AR). But I have heard it in my buddy's car for a while and I could swear it turned on and off IIRC. This was about a year and a half ago and I haven't heard him mention any work or problems related to the ECU cooling fan. Sorry I don't have a definite answer for you.

P.S. lol @ the water injection joke

Next time you have your car out...before you shut your car off after a trip sit in the passenger seat and open the glovebox and stick your ear inside to see if you hear it! Thanks I am very curious because now that I heard it for the first time a couple of days ago while cleaning the glovebox out, I seem to hear it louder and can zero in on the noise from the drivers side..I can tell because when the car is cold I dont hear it, but once the fan kicks on I hear this buzzing, humming noise.

[cn555ic]

Originally Posted by JamesM3M5

Oh come on, it was funny, and not directly at your expense.

BMW has been doing this for years. Many come with an "E-box" fan. It will even set a code in the ECU if it fails. There is either a sensor inside the box or built into the ECU board (depending on model / year) to monitor temps, and it runs automatically.

You are probably right...

[Tzu]

Mine is quite noisy as well. After shutoff, it runs for a minute or two.

[TurboBimmer]

Originally Posted by Tzu

Mine is quite noisy as well. After shutoff, it runs for a minute or two.

+1 mine strated doing this some months ago. I'm sure the fan wasn't that noisy before.

[cn555ic]

I guess it is suppose to be on then from the number of people posting. Wow. What fail on BMW to make such a noisy fan and ruin the interior cabin noise

[Jeff@TopGearSolutions]

I do hear mine from time to time. I thought it turned off at one point though. I'll have to pay more attention.

[bimmertt]

can't hear mine, but it would make sense that it would stay on the entire time until shut off.

[kanecvl]

I have the same problem. Sometimes I hear it sometimes I don't. I was told that when you hear it that means it going bad.

[marcvtec]

Great after reading this thread I will probably be hearing mine all the time now...
Thanks Bro,