[kdtokolish]

I have discovered that the water isn't heating in my dishwasher leaving food and undisolved detergent on my dishes/glasses. Can anyone give me a comprehensive list of all parts that could cause this and directions to make repairs myself? It is a Whirlpool Gold Quiet Partner III, model GU1200XTKS0, series FM0618431, type 575-0. Help is greatly appreciated. My budget won't allow for calling a repairman.

Thank you.