The water temperature does not get over 98 degrees.

First the dishwasher shut it self off. I don't know if it was in reaction to an automatic shutoff it has to protect itself or what actually happened. After turning it back on the water temperature stayed at about 115. Today the water temperature will only get to 95-100 degrees. I was wondering if it could possibly be the heating element or what else could cause this. If you have any advice I would appreciate it. I know it is an AM14.