Having dismantled the cleaner body to assess the fault, I'm pretty sure
that the fault lies with the carbon brushes in the motor. When the
power switch is pressed, nothing happens, when pressed again, and again
etc, the motor starts up but is intermittent and appears to run slowly,
before accelerating to full speed. There is a crackling sound within
the normal running motor sound and also some electrical burning smell.
Using a tester, I have been able to confirm that power is getting
through to the motor so that erradicates problems with the cable, or
Googling for parts turned up that Carbon brushes are available for this
model, but little else in the way of information.
Can anyone point me in the direction of a service/repair manual for
this machine that would enable me to determine that the part I saw is a
correct replacement for the existing brushes, and would also provide
information on how to replace the part?
Failing that, would I be better off buying a replacement motor or even
scrapping the product and buying a new cleaner?