Dishwasher seems to run OK other than the water is not heating. I have swapped out the heating element and it's still cold. I read on line that the relay could be at fault and it's a simple + cheap repair to do yourself with a soldering iron. My question is, Where do I find the relay. In the door? or below in the main bulk of the machine? Are there any other reasons for the water not heating? and how would I check (I'm fairly technically minded).