Cup Open on a GE dishwasher reminds you to add detergent and latch the cup; pressing Start again overrides it.
Model compatibility: GE reuses codes across series and model years, so Cup Open may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The detergent cup has not been closed.
When the display says Cup Open, the detergent cup has not been closed. It works as a reminder to add detergent and latch the cup shut.
What happens and how to move on
With this message showing, the cycle will not start. You can override it by pressing the Start pad again without opening the door. If the problem persists, contact service.
Compare with C8
C8 sounds close but means the cup is blocked from opening fully. Another one to keep apart is C7, the temperature sensor circuit.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your GE appliance?
Book a specialist visit for a clear estimate and approval before any repair.
