Ikea Renlig dwt160 intermittent heating fault

Hi all,

My dishwasher (ikea renlig dwt160, pnc 911989307/03) has an intermittent issue whereby it doesn’t heat the water. I took a gamble on replacing the heating element which I thought had resolved it as for a few weeks it was fine although the issue has returned.

Holding down select for 5s makes cycle lights flash which I presume is the fault code although I don’t know how to interpret. Doing this followed by other random button presses seems to reset it for a while.

It would seem a sensible starting point would be to read the fault codes. Can anyone advise how to do this or anything else I could try?

Thanks
Dan