My mother's old Bosch is playing up. On a normal wash it just doesn't seem to take on board enough water. If you chuck extra water in it seems to work fine but otherwise you can hear the pump running and if you yank the door open, you can just witness some feeble jets of water coming from the washing arms, too feebly to make them rotate.
On a rinse cycle it seems to work okay.
I've checked the inlet tap, hose and hose filter. The inlet solenoid seems to be working fine as does the pump which pumps with gusto when more water is manually added. I'm guessing some sort of level sensor is playing up. Is this plausible?
I left it running with some dishwasher cleaner in the hope that this might clear any small internal blockage. What should I try next?
Tim