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Error code · Dishwasher

GE Dishwasher Message Cup Open: Close the Detergent Cup

On GE electronic dishwashers that display C-codes, such as the PDT855SSJSS, the message Cup Open tells you the detergent cup is not closed. The control checks the cup before it starts, and if the lid is…

Low risk · DIY check OK
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Code
Cup Open
Appliance
Dishwasher
Brand
GE
Warranty
30-day workmanship

What Cup Open means

On GE electronic dishwashers that display C-codes, such as the PDT855SSJSS, the message Cup Open tells you the detergent cup is not closed. The control checks the cup before it starts, and if the lid is up it will not begin the wash. You see the message on the panel and the cycle does not start. It usually happens when the cup was left open after loading or the detergent was added and the lid was not pressed shut.

Common causes of Cup Open

  • Detergent cup lid left open
  • Lid not latched after adding detergent
  • Dish or residue keeping the lid from closing
✓ One safe check you can try

1. Add detergent to the cup. 2. Press the lid down until it latches. 3. Close the door. 4. Press Start. If you want to run the cycle without opening the door, pressing Start again overrides the message. 5. Make sure nothing is blocking the cup.

! Why to stop there
  • If the lid is latched and the message stays, the cup switch may be failing.
  • We check the switch and the latch before replacing anything.
  • The price is in writing first.
Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.
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Other Dishwasher codes

Smart Assist light redGE Dishwasher Smart Assist Light Red: A Potential Problem Was Detected Smart Assist light yellowGE Dishwasher Smart Assist Light Yellow: A Notification Is Waiting in SmartHQ Start light flashingGE Dishwasher Start Light Flashing: Door Opened or Cycle Interrupted Low Rinse AidGE Dishwasher Low Rinse Aid Indicator: Refill the Dispenser C8GE Electronic Dishwasher Code C8: Detergent Cup Cannot Open Fully FTD / F56GE Electronic Dishwasher Code FTD / F56: Failure to Drain H20 (spelling variant)GE Dishwasher Code H20: Fill Brought in Too Little Water H2OGE Dishwasher Code H2O: Low Water in the Tub
Cup OpenCup Open questions
What does Cup Open mean on a GE dishwasher?

It means the detergent cup is not closed. The control will not start the wash until the cup lid is latched or you override the message by pressing Start a second time.

How do I override Cup Open?

After adding detergent and latching the lid, press Start again. That overrides the message without opening the door, so you can start the wash without waiting or reloading anything.

Why does it say Cup Open when the lid is shut?

A dish or detergent residue can stop the latch from seating. If the lid is clearly closed and the message stays, the cup switch needs testing, which we do before replacing any part.

Book a visit

Still unsure about Cup Open?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 547-5545