Hotpoint WT965 will not supply water to flush conditioner tray!?

Anyone care to help please, my Hoptoint WT965 works fine apart from flushing of the conditioner on rinse, all was good until now, its just over a year old, also the machine is in good alignment it’s not as if the conditioner can’t run out the tray it’s the machine supply’s no water to activate the overflow/siphon on the conditioner tray.

tia