Model Number:
Brand: Bosch
Age: 6-10 years

My dishwasher shows no water coming in.
I've checked the water hose, it looks just fine. I've opened the filter on the water hose and as far as I can see it's clean.
Doesn't seem that the door doesn't shut properly (I've read that it could also result in this indication)

When starting the dishwasher, I hear a humming sound from the pump, and after 10-20 seconds the water indication turned on. The humming still continues...

What would be my next steps?
Trying putting some citric acid in the bottom of the machine (where the filter is) to clean the pump in case it's stuck?
Could it be that the solenoid valve is malfunctioning?
Any other likely problem that could happen?