I have a Bosch Classixx 6 1200 express washing machine showing error code F21 on the display, what is it?

You can find a PDF copy here: Bosch Classixx 5 Manual

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.

There is no reset as such, if the motor shorted when the motor brushes went there is a good chance that it blew the motor tracking or relay on the board. Sometime this is indicated by F20 or F21. Unfortunately this will be a new board. You could try to run a motor test as follows:
Hold in the start button while turning the dial one click to the left (30 easycare) wait until the display shows 888 or two indicators light up next to dial.
Release start and turn dial to 60 cotton (WITHOUT GOING THRO THE OFF).
Press start
This should start a motor test
slow turn one way, slow turn the other, pump on then up to full spin.
(some machines will show the rpm on the display).
If this does not work, you probably need to change the module aswell.
Best of luck

bosch classixx 1400 express washing machine drain pump This video will show you how to change the pump washing machine
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it is a motor or pcb fault this is a reset code as follows,
turn dial to off 12 0clock position then turn to 6 oclock,
press and hold the spin buttonat same time turn it to 7 oclock,continue to hold the spin buttonfor 5 seconds,release button,turn off.
next time you turn on the error code should have gone ,
if it does not work go through the proceedure again i had to try it 3 times but it does work

its your motor

I have a Bosch Classixx 6 1200 express washing machine showing error code F21 on the display, what is it?

go to http://www.repairclinic.com/0078.asp

my classixx6 1200 express is flashing f21? what is wrong with it?

got a bosch washing manchine it keeps coming up f21 error and i have no book 2 see wot it is can you help me by tellin me wot it is thanks