Hello I have similar problem to yours with rear heather and defog in Subaru Libero E12 V2 I re-solder my fan unit but it is still not working. You wrote " So, in between I found a solution for my defect Fan Unit. I could replace the high power relay on the electrical board, and now everything works fine. Greets KleinerMuck" Please help me where is "the high power relay on the electrical board" Is it electrical board in fan unit ? Best Reagrds from Poland Marcin Dobas