D4D "04" Heater Fans Not Working

[bluebones]

hi everyone, after months of hassle free motoring the rav has decided to throw another fault at me, not a big problem but really need to get it sorted asap due to it being the missus motor and the little one being ferried around in this cold weather,

Today the heater fan stopped working, non of the settings 1-4 work, ive checked the fuses and they seam fine, is there a common fault with these? also what else could i test? was trying to locate the heater resistor but could'nt see where this would be,

thanks in advance

george