GE dishwasher C4: repeated fill / float or sump condition
GE Appliances says C4 can follow repeated fill after a power failure and can involve a stuck float or debris in the sump.
What this guide covers
Error codes: C4
This guide follows a structured decision tree built from manufacturer troubleshooting information. It does not assume that the most commonly replaced part is the failed part, and it does not show an exact-fit replacement part unless model compatibility has been independently verified.
Continue this exact diagnostic
Safe troubleshooting sequence
Start with the observations and external checks that can be verified without opening energized assemblies. The interactive version asks these in order and changes the path based on your answers.
- Check the owner-accessible float areaGE advises tapping the float cover if it is stuck and checking the sump for debris.
What the answers can lead to
Clear owner-accessible debris and free the float cover
A stuck float or clogged sump can trigger C4.
Evidence strength: Strong
Press Start then Cancel/Reset as GE directs
A one-time reset is part of GE’s C4 guidance.
Evidence strength: Strong
C4 persists after the float/sump check and reset
A recurring C4 condition requires model-specific diagnosis.
Evidence strength: Strong
When professional diagnosis is the safer next step
A recurring C4 condition requires model-specific diagnosis.
Appliance Verdict stops before energized electrical testing, gas-system work, sealed-system work, and other checks that can create unnecessary risk. A technician can use the model, issue, and completed checks from the interactive diagnostic as a starting point.
Repair or replace?
A diagnosis and a repair decision are different questions. Once you have a real repair quote, compare the total repair cost with the all-in price of a comparable replacement. Warranty or protection-plan coverage, appliance age, reliability history, efficiency, and likely future repairs can all matter. Appliance Verdict’s interactive result includes a transparent cost comparison rather than a black-box replacement recommendation.
Manufacturer sources
Dataset reviewed through 2026-09-11. Appliance Verdict is independent and is not endorsed by the manufacturers cited. Always follow the exact owner or service documentation for your model.
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