I think our Bosch Classixx 1000 Express might not be heating the water because the washing is coming out stone cold even after a 60 deg. wash. I'm sure it used to feel slightly warm on removal but I'm beginning to wonder if I am imagining this! I have checked the manual but it says nothing about rinse temperature. The cycle is working normally otherwise. Is there any way I can check whether there is a fault? It's a few years old now and out of its guarantee. Thanks.