did you remember to bend back the tags on the brushes to RELEASE the brush FULLY out of its housing putting PRESSURE on the armature.
wirecutterman, February 2008
may be a faulty out of balance switch - prevents spin if machine detects the load as unbalanced. possibly a faulty switch or a problem with the suspension system?
Check out my site for info: www.2ndwave.co.uk/manual.html