My dishwasher only requires the water to be 30c, and combined with a longer wash cycle does an excellent job of cleaning the dishes. My hot water tank heats to

My dishwasher only requires the water to be 30c, and combined with a longer wash cycle does an excellent job of cleaning the dishes. My hot water tank heats to 60c, so my dishwasher would still need a thermocouple and a heating element to mix it to 30c, as there's no guarantee that my hot water tank is actually full.