Bosch Dishwasher Troubleshooting ?

I Have a Bosch UK dishwasher model Classixx SGS43C02BG/35 and trying to use the troubleshooting program with buttons from the left
1=Normal 65c, 2= Eco 50c,3=Quick35c,4=Pre rinse
I have started the test cycle button 1 and 2 now flashing
then press button 1&2 again to start the test, the wash cycle completed
and button 3&4 remain on after completion
Question is this indication of a fault ?
The dishwasher will run normal 35c wash but will not complete the 50c and 65c temp wash but stops after the prewash no water going into the machine ?
The wash cycle will complete if I fill with cold water and the heater seems to operate ok to50c or 65c