If you have a washing machine with a screen: electronic (with LCD display) - and the error is on f21
If you have a mechanical washing machine (without a display) with a programmer, then the six hundred and eight hundred or eight hundred (and six hundred) and “rinse mode” lights up or flickers

Content
What does this error code f21 mean?
You wanted to start washing, but the washing machine drum does not rotate.
Bosch error display signals
The washing machine has stopped during washing and is not spinning the drum.
We check with our own hands - we decide
- Perhaps you have a voltage failure of less than 200 W, and this is not enough for the operation of the washing machine (often happens in private homes);
- Check if the drum is spinning, scroll it by hand, perhaps hit a bone or other foreign object and prevents rotation.
We replace and repair
- There was a short circuit in the engine, repair or replacement;
- We replace the engine of the washing machine, it has become unusable;
- Wear of motor brushes, replacement with new ones;
- We repair the electrical module, or we replace it;
- We replace the speed sensor of the washing machine - repair of the tacho sensor.
Carefully! A short circuit may occur, as well as fire due to electricity, be careful, unplug the washing machine from the mains and entrust the repair to the master!

Other washing machine errors:
