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aux fan
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  1. E39 (1997 - 2003)
    Really stumped on this one. The aux fan only works when the A/C is on. I replaced the temp sensor on the lower radiator hose and the aux fan sensor on the shroud. I tested the fan through INPA with low/mid/high speed and it works so I know the fan is still good. I also checked the two big...
  2. E39 (1997 - 2003)
    So my a/c head unit started flickering last fall, and then the A/C stopped working. I bought a replacement head unit and had a local shop program it, but I still don't have A/C! I replaced the FSU to no avail. I can feel cold air being forced into the cabin at highway speeds but the blower does...
  3. X5 E53 (1999 - 2006)
    Hey guys i hope i would get some help with my e53 thats driving me crazy since i bought it even though i used to love the X5 but now i hate owning it. The radiator fan stopped working a few weeks ago and the engine been overheating when i stop and keep it running and the AC is not blowing cold...
  4. E39 (1997 - 2003)
    Hey guys I've read a bunch of stuff on this already and could not find any solution what to what causes my aux fan keep running on high... I dont want it to drain the battery so I disconnected it, but basically as soon as I connect it back no matter if the car is completley off or on, it will...
  5. E39 (1997 - 2003)
    Hello all, I would like to continue the discussion on the AUX fan for the E39 1999 540i. Problem: Fan does not spin even with AC button on. Overview: The car is a post 1999, so I have the three prong connector with the box behind the fan. I bought a new fan and plugged it in before...
  6. X3 E83 (2004 - 2010)
    HEY EVERYONE I DRIVE A 2006 BMWX3 AND THERES NO AUX PORT! CAN YOU BELIEVE IT? ANYONE KNOW IF THOSE AMAZON ONES ARE A GOOD IDEA FOR PURCHASE OR ANY TIPS ON HOW TO GET ONE INSTALLED FOR UNDER 100$:bawling:
  7. X5 E53 (1999 - 2006)
    2005 BMW X5 3.0i I've recently been having coolant system issues/leaks. At random times I will get significant puddles of antifreeze under the car. It seems that it only occurs after a drive of about 30 miles, but it's still not consistent. The check coolant level indicator will come on and...
  8. E39 (1997 - 2003)
    Hey i have a 97 528i (e39), i have read different forums but i cant find what corresponds exactly to my problem. When i turn on my A/C and drive on the highway, about 70- 80 km/h the temperature guage is normal (needle in the middle). But when i get back to town and drive in low speeds, the...
  9. X5 E53 (1999 - 2006)
    Hi All, Newbie here (2004 X5 E53 only 57000 miles on clock). I just noticed that (on one of the hotest days in the UK thi year) my air con isn't working. I took it to have it re-gased but was told that there was no problem and no leak but it still doesn't work. Before I spend out fortunes on...
  10. E60 / E61 (2004 - 2010)
    Hi, I am quite the noobie when working on cars but I'm trying to fix my aux fan on my e60 because the AC doesn't work. So far I have replaced the fan and checked all the fuses(the ones on the diagram in the truck and glove box) and and everything seems okay but I'm not getting any power to the...
  11. E39 (1997 - 2003)
    Okay so I have a 1998 540i and I washed the engine bay. After I washed the engine bay I started the car to warm up the bay and dry up all the water. It started normally and a few minutes later the auxillary fan came on and was running at full speed. It has been two days and it still runs at full...
  12. E39 (1997 - 2003)
    So, today my car caught on fire, but I was able to put it out before too much damage occurred. I have a 2001 BMW 530i just for the record. It seemed to come from the auxiliary fan, burned a hole through the vent as seen in the attached picture. I hear that there was a recall with certain models...
  13. 7 Series - E65 / E66 (2002 - 2008)
    I've been overheating during summer traffic jams (never on the open road), and the fan will not cut on....is it the entire fan, or the fan clutch, or other things ? I don't have any leaks and I've done the hose tests, and my lower hose gets very warm, and no leaking fluid, expansion tank level...
  14. E39 (1997 - 2003)
    Changed Aux Fan last weekend following SleekBMW's excellent write-up and confirmed working when AC is on. However, I noticed two situations when I thought it should be on but it wasn't: 1. just after turning off car. 2. idling after fully warmed up. I waited 2 or 3 minutes idling, and the fan...
  15. E39 (1997 - 2003)
    I have been on here for a while now trying to learn as much as I can from all you Bimmerfest vets. The only problem is... It gets a little difficult to decipher ( till its too late) For a beginner like me if What I just learned applies to my 2000 540i (e39) or not. So I'm hoping all will help...
  16. E39 (1997 - 2003)
    Problem with my 540i E39. This problem started while I was at a drive thru waiting, and my car just overheated! So I turned off a/c and opened window, it wasn't until after I started driving again did it decide to cool down. Since this has happened my outside temperature sensor will give the...
  17. E36 (1991 - 1999)
    My Aux fan wont turn on. One day it was stuck on and kept running after the car was off. I researched it and figured it was a stuck relay. I purchased a new High and Low speed Relay's. The fuses seem to be ok. The Aux fan still wont turn on, even when I turn on the A/C (this leads me to believe...
  18. E39 (1997 - 2003)
    My aux fan keeps going on/off every 5 minutes (been doing this since winter and I've already replaced it once). I've also replaced the sensor for the fan that plugs into the rad. I've had enough. How can I easily disconnect this thing? The plug is tricky to get at. Are there any easier...
  19. X3 E83 (2004 - 2010)
    Hi everyone. I'm new to the forum and have just bought my first BMW. It's a 2008 X3 M-series. I've loved the car so far. Unfortunately, I've had a recent issue come up. My wife was driving the car to work earlier this week and the it started to run hot on her sitting in traffic on the...
  20. E46 (1999 - 2006)
    Hi everyone, I realise that this may be difficult to diagnose but I will give it a try. Over the last couple of weeks I have heard a strange blowing noise coming from the engine compartment. It only occurs when the car is warmed up and takes off from a stop. It doesn't make the noise every...
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