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Opel Astra J interior fan problem

I have got some problem with my interior fan and with winter coming it is crucial this little thing work properly.
I will now try to explain this problem:

9/10 times the fan work as it should on step 1-6.
After going on max (step 6) for some time and I want to slow it down it start to lagg, going very uneven and sound bad, even stops working, on every stage down to zero.
If I choose full speed again it get a kick in the butt and work like a star on stage 6. 

I put it on the floor of the car to see how it looked and took my phone and record: 

Little tick-tick sound. Yesterday when I had it mounted the fan stopped so kicked it and it begin to work. 
It didnt show any signs of begin in bad shape, axel felt good in any direction and no resistance in bearings.

/Hejhopp from Sweden
Well.. little notification true or not: Days with sun, car is parked with sun from dusk to dawn, the fan is not working until after coupe is cooled down.

I'm gonna change the resistor that control the speed. Its "cheap" compared to a used/new interior fan.
I didnt changed the resistor, cause all fan speed levels worked properly. Removed the fan and gave it clean current from lab equipment and the function was not good at all.

Bought new fan from Germany manufactured in Denmark and everything is fine again. Very good.

Total cost: ~1000 sek, 85 pound or 95 euro.. Used fan from swedish scrapyard would cost me almost double money.
Hi Hejhopp123

It nice to see that you got your fan sorted.

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