I have the same problem, initially the 65C cycle did not dry the dishes so had a look inside and checked all the connections (all ok). Put it bck together and then the 70C, 60C & 50C heated the water.
Well that lasted 2 weeks now all the programs do not heat the water.
The symptoms make me think that this may not be the heating unit.
Any ideas on the problem: PCB, Temp sensor, Element?
Gary