diplomat with washing up liquid in it

Hi, 😥 😕
Just wondering if anyone can help me.
One of my kids has put washing up liquid into our dishwasher. I put it in the garden, attached the hose pipe to it and tried a cold rinse cycle. this didnt work so i found the logic clock and instructions and reset the clock.
This enabled me to do a cold rinse and i repeated this untill there was no more suds draining from it. However, the clock will not reset it stays at the end of the cold rinse cycle.
I reset the clock to increment 60 and started a full wash. This started ok but when it got to increment 12 cy/he it just stayed there for about half an hour before i switched it off. The water inside was still cold.
Is this the heating cycle and could the suds from the washing up liquid have damaged the heater?
I cant find a model number or serial number anywhere on the machine, there is a dial on the front for cold rinse, off and wash, three lights, in progress, salt, rinse aid, two buttons, temperature selector, start.
Any help would be appretiated.

Thanks. 😕