Written by
Marcus Delaney Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeCup Open
ApplianceDishwasher
What Cup Open tells you
The message shows when the detergent cup is open. Think of it as a prompt to put in detergent and latch the cup shut.
Moving past it
While the message is up, the cycle does not begin.
To override it, press Start a second time without opening the door.
If it keeps returning, contact service.
Easy to mix up with
C8 sounds alike but says the cup is blocked from opening completely. C7 is another display to keep apart, since it refers to the water temperature sensor circuit.
San Francisco dishwasher service
If Cup Open repeats even with detergent added and the cup latched, call (415) 729-2045 to talk through dishwasher service in San Francisco or the Bay Area, and have the model number nearby.
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 is not closed.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your GE appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
