when did you last check pickup pipe for blockages, or clean the motor pre filter the sponge can be washed under a cold tap allow to dry completely before refitting the other filter is under the bin housing just knock the dust out of this one if this fails to cure problem brushes in motor have insufficent pressure on comutator causing the thermal overload to kick in,replacing the brushes will cure the above problem do in the above order the first two cost nothing the brushes about £7
wirecutterman
December 2007