Bosch WLF20260 washing machine - Does not drain the water, error E6.

Hello gentlemen, we need the help of more experienced household appliances technicians.
The washing machine behaves in two ways. More than once the E6 error is thrown, sometimes it washes, grinded and displays 1 minute until the end of the cycle, but washes all the time. I can't find error codes for this model too damn. Only what I found is this: https://washingcodes.com/bosch-washer-error-codes/#.XAZRa9tKiUk
Will someone help something?

Heats the water?

Check the heater for leakage to ground, resistance of the temperature sensor in the heater and continuity of wires from this sensor to the module.

Here is a tip where to look: https://www.elektroda.pl/rtvforum/topic3277070.html#16090785

Done.
The reason was a clogged drain hose with muck, sludge, some sludge. Just before the failure occurred, a clip was flying in the pump impeller and it was all vibrating strongly. Hence the suspicion that due to these vibrations the glutes broke off the inner walls of the hose and fell into the siphon, the stream of water beat it all up and the hose was blocked.

However, I am concerned about the earlier failure to heat the water, unless the washing machine was only in the soaking cycle and then it was supposed to be pumped out, which did not happen. It's ok at the moment. We'll see. However, it makes sense to start by simply blowing into the drainpipe.
Thanks for the trouble, colleagues, maybe someone will find this example useful.