Servis M4905 dishwasher

Hi, I have a servis m4905 (integrated) dishwasher. I’ve been using it okay for about a year since I moved in, but not sure how old it is as was in the house when I moved here. It’s been working fine and still does mostly.

However, for the past month or so whenever I use the longest cycle (cycle 5, 65 degree, warm prewash and main cycle) instead of at the end of the cycle opening the door and steam escaping, there is quite a bit of water on the contents and it’s cold. Everything is clean however, it’s just covered in cold drops of water.

I did try opening the door mid cycle to check if the water wasn’t heating, but it is – the water is hot, the detergent has dissolved and it is cleaning normally.

I tried a ‘normal’ cycle (cycle 3, 40 degrees) and when I open the door at the end the expected outpouring of steam is there. And everything is clean.

Just wondering what the problem might be that’s causing the longer cycle to end up cold, even though everything is washed and the other cycle works fine?