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If you check the spindle/rod that comes out of the side of the motor to see if it is damaged, has chunkes missing, if you get some fine sand paper and sand it down all around , as sometimes the belts...

If the Brushbar spins then the belt is fine, if you turn the dyson upside down you will find to rubber flaps if you open these up and get a thin rod/stick/piece of tube and push it in either of these...

If you have taken the top off your dc07 cyclone, and you have found it os total clogged with dust/ rubbish, then you either need to empty it right out, beware that sometimes opening the top of the...

When you took off the soleplate/base plate, did you notice if the belt was damaged at all?

Also what type of dc04 model is? Colour model name etc.

How long has the problem been happening for?