Water not hot nor warm

When you run the hot water at the kitchen sink until it is hot and start a cycle on your dishwasher, is water hot when you open the door after it stops filling?
If no, the diswasher is connected to the cold water line, not the hot water line. The water temerature entering should be a minimum of 120 degrees but no hotter than 140 degrees.
If the water going in is hot, but it cools down after each filling then the heating element has failed and needs to be replaced. When the heating element fails, the dishes, especially the glassware will be foggy and still dirty.
Please reply with what you find. Good Luck!