GE Electronic dishwasher Error Code Cup Open: Meaning & How to Fix It

By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026

GE electronic dishwasher error code Cup Open means: Detergent dispenser cover has not been closed. A turbidity sensor. When your dishwasher isn't working, use the symptoms and DIY troubleshooting advice to find the cause of the problem. [1] Keep using it? Only if the owner checks below clear the code; if it returns, stop and book a repair. Start with the owner checks below, beginning with: write down the code and model number.

Source: GE electronic dishwasher error-code chart, via Sears PartsDirect [1].

Quick facts

Code	Cup Open
Also shown as	None listed by the manufacturer
Brand / appliance	GE electronic dishwasher
System	Suds / detergent
Meaning (service chart)	Detergent dispenser cover has not been closed. A turbidity sensor. When your dishwasher isn't working, use the symptoms and DIY troubleshooting advice to find the cause of the problem. [1]
Keep using it?	Only if the owner checks below clear the code; if it returns, stop and book a repair
DIY-safe?	Owner checks only (listed below)
Support	GE Appliances support (products.geappliances.com)
Source document	GE electronic dishwasher error-code chart (via Sears PartsDirect)

On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ

What error code Cup Open means on a GE electronic dishwasher

Detergent dispenser cover has not been closed. A turbidity sensor. When your dishwasher isn't working, use the symptoms and DIY troubleshooting advice to find the cause of the problem. [1]

This is a suds / detergent code. Codes and wording can vary by model, so check your owner's manual for your model number.

How to fix GE electronic dishwasher error code Cup Open (safe owner checks)

Safety first: disconnect power before you remove any panel or reach into the sump or drum. Do not touch wiring, the control board or the motor. If you see water near electrical parts, stop and call a technician. These steps are based on the GE electronic dishwasher error-code chart (via Sears PartsDirect) [1], rewritten for clarity.

Write down the code and model number. Note exactly what the display shows (Cup Open) and copy the full model number from the rating label, so you can confirm this chart applies to your electronic dishwasher and order the right parts.
Clean the filter. Try our water filter finder Most common symptoms to help you fix your dishwashers Choose a symptom to see related dishwasher repairs.
Check the drain hose. Unplug the dishwasher and clear clogs from the dishwasher drain hose. Unplug the dishwasher and clear clogs from the dishwasher drain hose. Unplug the dishwasher and clear clogs from the dishwasher drain hose.
Reduce the load. Unplug the dishwasher and check the overfill float switch for damage. Check the overfill float switch to see if it's stuck in the up position, which would keep the dishwasher from filling properly.
Check the settings. Adjust the water temperature setting in small increments to prevent scalding.
Restore power. Restore power.
Test and decide. Run a short cycle or restart and watch the display. If Cup Open comes back after these checks, stop using the dishwasher for this function and call a technician, because the remaining causes need meters or part replacement.

The first and last steps (and the power reset) are general owner checks added by ErrorCodePro; the rest follow the GE electronic dishwasher error-code chart published by Sears PartsDirect, rewritten for safe owner use.

Parts that may be involved

Exact parts depend on your model number. This page lists part types only, never part numbers.

No specific part is implied by the manufacturer's guidance for this code.

When to call a technician

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Anything involving wiring, the control board, the motor or the water valve electrics
The appliance is under warranty: contact GE Appliances support (products.geappliances.com) first

Frequently asked questions

What does error code Cup Open mean on a GE electronic dishwasher?

The GE electronic dishwasher error-code chart lists Cup Open as follows: Detergent dispenser cover has not been closed. A turbidity sensor. When your dishwasher isn't working, use the symptoms and DIY troubleshooting advice to find the cause of the problem.

Is it safe to keep using the electronic dishwasher with Cup Open?

Only if the owner checks below clear the code; if it returns, stop and book a repair.

Can I fix GE electronic dishwasher error Cup Open myself?

Only with the owner checks on this page, starting with: write down the code and model number. If it persists, call a technician or GE Appliances support (products.geappliances.com).

Sources

Sears PartsDirect: GE electronic dishwasher error-code chart (third-party copy of manufacturer service data)

Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with GE.