Turn off both the H/C water supplies (if H/C fill),may only have a cold fill remove both hoses put ends into a bowl or bucket now try the output of both H/C taps,if O K look inside where you have just removed the hoses from,should see a small plastic filter, gently ease out and clean ,refit both of the filters,H/C reconnect the pipes,check for leaks.
if you have self cutting taps, change them for the 15 mm hole version due to the small holes in the self cutting ones struggling to try and supply the machine with water .The machine could easily time out and HALT the wash program
wirecutterman, July 2009