What does DE mean?

Try this website. I explains the most common symbols Bosch use.

https://www.bosch-home.co.uk/experience-bosch/using-your-appliance/washing-machine-symbols-guide#/Togglebox=8805164-8781535-1/

check that the water flow solenoid is operational and not blocking of the spray rinse requriement

This normally means the that it has locked the door to stop an children opening it while it is washing. If it did not lock the door, a child could open it and burn themselves on the hot water.

Turn off washing machine...Press and hold temperature button turn on machine whilst still de-pressing temperature, holding down both buttons,let them both up together, press soil type for 2 secs, then turn off and message should be gone.

Possible fault could be with the door closing swtich, the inlet filter, the inlet valve, low flow of water or fault in the main board. you will have to check this out one by one, open the door and inside the latch lock, there is a limit switch. use a cleaning spray. next check the inlet pipe connection, open to check for low pressure , dirt in the filter. Next you need to open the panels and see if there is any wire damage, insect attack on PCb. The water level sensor also could be another culprit. Since the PCB is epoxy layered it wil be difficult to check the componets. But try this out see if this advice helps..Good Day

I had the same problem it was the pump filter on the back. unscrew it and clean it. That worked for me.

That symbol means that there are msgs waiting to be sent in the out box. You cant get rid of it as there are msgs in the out box. Either send them or remove them.

The dE error means that the door switch has failed to "make" Either the door is not closed all the way, or the door switch needs to be replaced or adjusted.

Sounds like your inlet valve is stuck Open ( meaning it wont shut off incoming water ) That may be defective or the control to it may be at fault.. Try unplugging the washer ..and see if the water still continues to fill up the drum? If that happens, then your valve is probably in need of replacement.. Typically, when de-energized..they close and stop water from entering the system.. Hope that helps

I suggest you get all your staff to search tirelessly for an answer, ChrissyJ!