Have this washer in w/shop atm and it comes up with f12. That codes not in book but gathered it’s a thermister fault (cheers steve) but it still does it. I have checked everything i can think of and even swopped the pcb off the same model as i got two of these the same and that makes no difference either. Any ideas before i wheel it outside and put a left over firework in it and withdraw to a safe distance?