Hot. The timer usually won't move on the dishwasher until it senses the water is hot enough to wash. If you rely on the heater alone in your dishwasher to heat up the water it will take forever. Some people even turn up the temp in the hot water heater to get things moving a little quicker.
Hot water for sure
You would hook the dishwasher to the hot water.
I think this is because cold water will not loosen stuck on food particles very well and the heat sterilizes the dishes.
I think this is because cold water will not loosen stuck on food particles very well and the heat sterilizes the dishes.