HI Klaus,
I've been off line for a while - moving house.
Thanks for the advice - it really may be the cabin filter because last 2 weeks the heather fan was working. Also may be there is some relation how dry is the outside air. Now it is winter in Australia and thinking about the problem - I think in all cases when the fan was not working the weather was foggy.
Unfortunately I don't know where it is and how to check it. I did not see any filters when I took the fan off.
Could you please send me a link how to do that? Do I need to replace it or just vacuum or wash it?
The rheostat seems to be OK
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