The short answer
Cup Open is a reminder rather than a fault: the control has noticed the detergent cup is not latched and is asking you to add detergent and close it. Nothing is broken and nothing needs resetting. If the message stays after you have latched the cup, the problem is the latch or the switch that reads it, not the dishwasher’s ability to wash.
GE dishwasher code as the manufacturer publishes it
Reference| Code | Meaning |
|---|---|
| Cup Open | The detergent cup has not been closed. It's a reminder to add detergent and latch the cup closed. |
What you observe alongside the code
- The message appears when you press start — The usual and entirely normal case.
- The cup lid springs back open when you close it — A worn latch no longer holds against the spring.
- The message stays with the cup clearly latched — The reading is wrong, not the cup.
- Detergent found loose in the tub after a cycle — The cup opened during the wash rather than staying shut.
What triggers it, most likely first
- The cup genuinely left unlatched — First, and the message is doing exactly what it was designed to do. Loading in a hurry is the whole cause.
- A worn or bent cup latch — Second: the latch is small plastic and it takes a knock every time the lower rack goes in loaded.
- Detergent residue stopping the lid seating — Third: a caked rim holds the lid a fraction open, which is enough to be read as open.
- A failed cup switch or its wiring in the inner door — Last: the switch that confirms the latch sits in the door panel with the dispenser wiring.
Check in this order, and why
- Close the cup firmly and watch the message — It should clear immediately; that ends the matter.
- Look along the rim of the cup for residue — A clean rim is needed for the lid to seat flat.
- Test the latch by hand with the door open — A latch that will not hold against its spring is the fault.
- Only then treat it as a switch problem — Everything above is free; the switch is not.
Clearing the code, then the owner-safe checks
- Add detergent and press the cup lid until it clicks — The click is the latch; without it the message stays.
About 5 min
- Clean the cup rim and lid with hot water — Removes the residue that holds the lid a fraction open.
Tools: clothAbout 10 min
- Check the lower rack is not knocking the cup as it slides — A loaded rack catching the dispenser bends the latch over time.
About 5 min
- STOP HERE if a clean, latched cup still reports open — The switch is inside the inner door panel and that is a service job.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. On a built-in dishwasher the supply is not switched at the door, so the breaker is the only reliable off. Leave the door latch switch wired as it is: it stops the pump and the heater the moment the door opens. Nothing here needs a panel off, so the breaker only matters if you go past the STOP step.
When this code is a service call
Call only if the cup is clean, latches with a click, and the message still will not clear — that is the dispenser switch or its wiring in the door. It is not urgent: the machine washes normally, and the worst outcome of ignoring a genuinely stuck message is that you lose a useful reminder.
Neighbouring GE dishwasher codes
Which model lines this reading applies to
This reading of Cup Open applies to current GE and GE Profile built-in dishwashers with a digital display or a lit status row, the platform on which the manufacturer publishes it. A timer-driven machine with no display never shows it, and a Monogram or Hotpoint-badged unit can use the same characters for a different fault. Machines with a tablet tray rather than a powder cup word this prompt differently and latch differently. Where a model-specific page exists for your unit it is linked above and is the more specific answer: part-level detail differs by family and belongs there.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
