j.d.s.here again I am sorry for wrong information I did not read your full question.overheating is caused by,either ,blockage, dirty filters or bad motor dyson motors are fitted with overheat protectors, this cannot be replaced as it is part of motor to check, start up vac feel suction at hose if o.k. take out filters and run vac again if o.k. your problem is motor to purchase motor last price I knew was £65 this job is not worth doing as dyson prices are lower than before good luck
J.D.S.
April 2007