Bosch classixx 1000 express wont spin

check motor brushes or capasator

F21 is a motor fault and in some cases can also involve a module fault. It could be as simple as the brushes need replacing or the drum has been severely out of balance.

have you checked the fuse box in your house?

check the pump may have ablockage..,

why life so unfair ?

Probably needs new brushes fitting in the motor, you will have to remove the motor to do this.

Remove belt, unscrew 2 bolts that hold the motor, unplug the motor connector, lever the motor back with a screwdriver. Check the motor brushes, if they are any shorter than 1 cm replace brushes.
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RepairClinic.com (which is good)
espares.co.uk
AppliancePartsPros.com
mcminone.com

Pl vote me 'very helpful' for the free help, thnks!

Try new brushes in motor you must clean armature.The brushes are worn.

Make sure that all the water has drained from the washer, if it has a filter, remove and clean, it is located behind a removable plastic panel at the front of the m/c, if it still does not spin, suggest you remove motor and check the brushes for wear, this is often the reason it won't spin, but will wash o/k.
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Thanks

Not a programme error but carbon brushes on motor.Fixed by local engineer.