Well, that can't be true: I've already got the 3rd UB 90 Beurer electric blanket within 10 days, and all of them showed the error "E1" within a few seconds or minutes ... According to the manual, this means that it wasn't plugged in properly, but you can't do much wrong, and copies 1 and 2 heated up for a few minutes before giving up the ghost with E1 and switching to 0! I spent a long time choosing, this underbed is right for me! It should simply WORK. The Galaxus customer service has kindly exchanged each one, let's see what comes next ;-(