Product review (5 stars): I could see fine rubber particles gathered on the inlet screens
You should be aware that the water inlet hoses need replacing from time to time. I kept my old hoses on and that blocked up the inlet valves.  I could see fine rubber particles gathered on the inlet screens.  I tested the inlet valves with a multi meter (see youtube on how to test water level sensor) and found them to be good. Cleaned out the inlet valves (see youtube) and all is well.