The thermostat is working properly, but after driving about 8 kilometers and the motor gets warm i have problems, the car almost stops.
The fans is not working, i gues it must be the fan controller. Does anyone have a picture where it is located?

 

You would not expect the fans to be running unless the engine is OVER temperature. Is this what the gauge is showing?

The fan is dead, i've tried to start the ac, than it should start automaticly when i put it on.
I tought it must be the controller than?

First check both fuses are intact. The fan control unit is fed by two of the fuses on top of the battery - the third of the bolt down fuse links and the green fuse nearest to them.

The fuses on top of the battery is ok

KEEP YOUR FINGERS AWAY FROM THE FANS - THEY CAN START WITH THE IGNITION OFF!

Next, remove the connector from the thermo switch.

Short pins 2/1 to activate low speed fan.

Short pins 2/3 to activate high speed fan.

If both speeds work OK, then all the wiring and the fan controller are OK

The common supply is on pin 2 and is solid red. The cables to pins 1 and 3 are red with a stripe. IIRC, the stripe is white for low speed and yellow for high speed. When you do the short, make sure you have a chunky bit of wire.

Thank you for the information rwbaldwin. I did like you told me, i found out that it was the controller that was defect. I changed if and now it works.
One more thing: my controller was 1j0919506 K, i got one used called 1j0919506 G, i tried it and the fan started when the motor got warm.
Do you think it is any diffirent between dose two controllers that has any negative effect on my car?

...my controller was 1j0919506 K, i got one used called 1j0919506 G...

From memory, pin-5 is unused on the 'G' version but is used on the 'K' version. Again from memory, this may affect the operation of the a/c as pin-5 is connected to one end of the ambient temperature thermistor.

This may mean that the a/c will work at all temperatures - even when the ambient temp is too low.

If you post the year and engine, I'll check for you.