2000S fans not working good

[ybn533]

Hi,

After I gone over a few forums about the fans issues I didn't find the answer.

My problem is that the fans are not running on the low speed. only on the hi speed. they do work on low speed when I start the a/c but they don't engage at low speed when they reach the hi tempeture.

relays= ok
fuses=ok
resistors ??? can it be that both of them not good? Can be also that one was bad before and only one worked, I didn't noticed it and only when both of them broke the car overheated?

So, any Idea what can couse the fans not to trigger on low speed? (remind you that the a/c do trigger the low speed)

Thanks
Yaron

[thstone]

Yes, it can happen that both resistors are bad as you described.

[ybn533]

Originally Posted by thstone

Yes, it can happen that both resistors are bad as you described.

So, if I understand right than the resistors are responsible to trigger the LOW speed?

[Trey T]

Most likely the resistor. I got rid of the bad resistor and tied both mode together as high until I found a better resistor.

I later found a different brand (Denso) and used it for low speed, same resistance and power rating.

[thstone]

Originally Posted by ybn533

So, if I understand right than the resistors are responsible to trigger the LOW speed?

The ECU determines if the fan should be operating at high or low speed. Then the fan relays are used to route fan power through the resistor for low speed or not through the resistor for high speed.

[Trey T]

No. Both fan has independent resistor. You can find these fan/resistor on older Mini Cooper

Originally Posted by ybn533

So, if I understand right than the resistors are responsible to trigger the LOW speed?