Why Isn't My Dishwasher Getting Hot Water?

It sounds like there might be a couple of reasons for that. Many dishwashers heat the water on their own, but if yours isn't, it could be set up incorrectly or there's a problem with the heating mechanism. Have you checked if the hot water line is actually connected? Sometimes, if it’s hooked up to the cold line by mistake, you'll end up with cold water in the dishwasher. If your model is supposed to heat the water but isn't, the heating element could be broken, which might require a technician to take a look.

Also, could you share what make and model your dishwasher is, and any settings you're using? That info might help narrow down the issue. As for heating, some dishwashers rely on the hot water from your tap, so running the hot water for a bit before starting the cycle is a good move. If that's not working, check if the dishwasher is designed to heat it itself.