Bosch SMS50E02 check water light on

Hi,

Full model ID is SMS50E02UK/01.

I’ve been having occasional problems with the check water light coming on for a few weeks. Checked all I could think of but turning off and on again usually sorted it out and once the problem goes away it’s hard to keep searching for what’s causing it!

Since boxing day the fault is permanent though, so I’m hoping for some help please. I’ve had a search on here but can’t find the same symptoms as I’m getting.

What happens is the programme starts and the drain pump runs for about a minute (normal behaviour I think). Next I think it’s attempting to take water in as there’s an electrical hum which I’ve traced to the valve at the end of the fill hose but after that the check water light comes on and the machine ends the programe.

I’ve disconnected the fill hose and checked the isolating valve turns on and off properly and also cleaned a very small amount out of the filter in the end of the hose. Reconnected and the same happens.

To cover all I could I’ve also checked the drain side out and found nothing wrong there either.

I think as there’s an electrical hum the coil of the valve must be OK, but wonder if the valve is stuck/broken somehow. Is there a way to get in and have a look inside – I’ve not been brave enough to have a go without some advice!

Any help appreciated, thanks.