replace the fan motor,same on mine put a new one one 5 years ago playing up again today,cant get a motor,20+years old,got the last from the local service engineer ,,he,s retired,the label is in german,worcester couldnt help,,,still on the case,,any idea any one,,ps you could replace the fan bearing cheaply,regards,,locking out as the fan motor has got tight,try and spin the fan,,2 screws,unit out,the 2 bolts fan out.....regards everett leics.
everett kirk, May 2009