just brought a e46 w reg 323i and the aircon/rad fan didint work so i have replaced it but this one doesn't come on either if i reverse the polarity on the fan it will run but wont turn off and i get a really loud clicking noise lick some thick is blowing but cant find it, the fan switch is ok and the fuse is still fine just can't work it out.

 

which fan r u talking about? has it got an electric fan which cools the rad and the condensor? and when does it not come on? with a/c on or when it gets hot?

 

hello mate it has just the electric fan that cools the condensor and the rad, the fan doesnt come on at all with the air con on or off or when its hot, untill tonight it just turned cold and i went out side and the fan was running but it wouldnt turn off so i had to unplug it

 

they run off of a switch. it could be a number of things. i also think there was a recall on some of these fans due to the wiring burning out. on the side of the fan there should be a multiplug. have a look at it to see if its okay. also is all your cooling system ok ie thermostat etc. ill have a little dig for you c what i can find

 

the multi plug is fine mate, i have checked the cooling system and it is perfect, the fan just runs all the time now tho if i leave the fuse in it, i have heard that they also take a temp reading from the air con gas's and if they are to hot they switch the fan on but i cant find a sensor for this as i thought maybe this was open circuited but cant find it, how would i go about getting recall info on it to see if has been done or not its just a pain i did think about wiring it up to a switch but would sooner have it working how it should thanks for your help

 

If you phone BMW uk with your reg/vin number they should tell you of any recall notices.
The ice switch for the air con will be inside the heater/air con(vapouriser) box, as it functions to stop this freezing, but also temps act as fan turn on when needed according to temp of air con system.
tabetha

 

so how can i change it or see if its gone to open circuit
thanks

 

Pull out FUSE for air con, if it stops that is your problem.
tabetha

 

so if it turns off once i have pulled the aircon fuse out which bit would i have to change on the air con mate.

 

If the fan does then turn off, your best bet would be to go to a air con agent(not bmw£££).
I do not know what type of air con system you have on your car ie orifice or expansion, but each have a temperature sensing arrangement on them.
Air con can be a mine field and one that I am not fully conversant with, so I can only advise a air con person if the fan does top with fuse pulled, unless you want to do without your air con, which I am sure you don't, as it is a good thing to have.
tabetha

 

i have pulled the aircon fuse out and the fan still runs the only time it stops is when i pull the 50 amp fuse for the fan,