Hi all, My 2009 Seat Altea XL heater A/C unit has suddenly stopped blowing. The fuses look OK, nothing obvious. The digital display and all the buttons still work, and give the impression it's working, but the fan isn't switching on. I've taken the glovebox out and can see a small whit plastic wheel turning when I push the windscreen / feet / faces directional buttons, but nothing else. Any ideas which part n the pic below I need to replace?