I have a Servis M4605 dishwasher and its has just gone over its 1 year warranty 😥
The problem is it has stopped heating the water and will only wash cold.
Its does a full wash, it just doesn’t heat the water.
This is a digital machine, so if it is completing the cycle it must think that the water is hot, therefore you are probably looking at a problem in the control circuits. Possibly thermistor, more likely the computer board.
Time for an engineer – this will be awkward to diagnose correctly – check the link in my signature.