If you have a washing machine with a screen: electronic (with LCD display) - and the error is on f18
If you have a mechanical washing machine (without a display) with a programmer, then the light for the number of revolutions is six hundred and four hundred, 800 (or one thousand)

Content
What does this error code mean?
Washing machine water does not merge, no drain and throws an error.
Bosch error display signals
Has stopped draining water, also does not spin clothes?
We check with our own hands - we decide
- Perhaps you have started the washing mode without spinning and the laundry in the washing machine is not wrung out;
- The drain hose of the washing machine is located incorrectly (self-draining), install at a height of 60 cm from the legs of the washing machine;
- Drain filter clogged washing machine.
We replace and repair
- Replacing the pump of the washing machine (pump)
- We repair the electrical module or replace it.
- Replacing the pressure switch (water intake sensor)
Carefully! Until the malfunction is fixed, do not use the washing machine, there is a high probability of flooding the neighbors from below!

Other washing machine errors:
