The dishwasher would not run immediately after installation (by me).  When you pressed the Start button, it would blink in a pattern - 5 blinks, pause, 5 blinks.  No mention of what that code meant in the troubleshooting guide, so I ended up having to schedule a service call.  Turned out that one of the problems was a known issue for GE dishwashers - the sensor in the door switch doesn't always align properly causing the washer to think the door is not closed.  It's a common enough issue that there are youtube videos of how to hack a fix in place.  Seems like GE should have re-engineered that part already.