I have a GE model GSD2030Z02WW in a rental home. When turned on all it does is make a low hum. I don't know where in the cycle it stopped, but the bottom was full of water. I took off the sump cover and didn't feel any thing blocking the opening. I'm mechanically inclined and can use a multimeter, but don't have any experience with dishwashers. I just need a little guidance to avoid unnecessary disassemblies. Your suggestions would be appreciated.
Thanks for your suggestions. This morning I disconnected it, flipped it over and found the pump motor stuck. By rotating the motor by hand I unlodged whatever was in there and It works fine now. It took 2.25 hrs complete with a test wash and clean up. I was surprised how simple the whole mechanism was. Thanks for your interest.