SPV40E30RU no cycle start ⇐ Bosch

[Vegas]

Good afternoon. The problem started about 6 months ago. When you try to start, advise water, then there are sounds similar to an attempt to start the engine and after a minute there are long squeaks, the "Tap" indicator blinks frequently. Restarting sometimes helps.
But the other day it refused to start even after repeated attempts. I discovered experimentally that it works properly if the washing temperature is set to 50 degrees (previously it was always at 70). What could it be? If the heating element is then why does it work at 50? The Bosch ASC specialist ordered the central pump to be replaced, but on the other hand, it works properly and there is pressure. What could it be?