Diplomat ADP 8132 error code

I can not find this code mentioned before, hence starting a new topic.

My Diplomat ADP 8132 was working well, but yesterday took over 3 hours to complete the economy cycle.

The lights show: 1,3 & 4 fixed on
2 off
5 flashing

These will not change pushing the reset.

I have tried resetting the pcb as detailed elsewhere several time.

I have taken the pcb out and could not see any signs of burning out (I am an electrician).

I have completely drained the system and reset the heater push button (It was ok and did not need resetting).

I put it all back together and though the program selector microswitch was working the light sequence did not change from above.

The washer started its cycle, but after about 5 minutes keeps beeping and sounding as if its restarting (as if in a program loop).

I am wondering if it is the PCB that has failed.

Any thoughts please?