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with my dc07 striped to a spine if i look where the hepa filter should be theres, a little black grill which ive removed (just to inspect) and upon switching on the vacum maybe 1 in 5 times theres a blue spark from motor and or carbon brush area..... is this a sign of motor failure or just a normal thing....
just on start up it sparks, but i have a spare motor, so i will probably strip it down and replace
Manchester Vacson