I have a similar problem. I have checked both ends of the hose and both filters are OK
Today I also noticed that the water level seemed to be far too high, and the foaming symbol appeared at the end of the wash. This seems to suggest the level sensor is blocked, rather than a fault with the triple valve.
I have no problem working on the machine, but it is installed in a limited space and will be difficult to remove for access.
I need to be sure whether I need the valve as I don’t want to remove it all more than once.