GE Appliances dishwasher C4: overfill
C4 means: Overfill / filled twice after power failure.
How to fix C4
- Reset at the breaker. If it was a one-off after an outage, it will not return.
- Check the float in the tub floor moves freely and is not stuck with debris.
- If the tub fills with power off, the inlet valve is leaking through: replace it.
When to stop and call a repairer
Turn off the water supply under the sink if the machine keeps filling.
What it costs
Parts: Inlet valve $25 to $50; float switch $10 to $20.
Service: A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.
Worth repairing? Yes.
How to check the error log
On most GE dishwashers, hold Start for 5 seconds with the door open to enter the service menu; on models with a hidden display, press Select Cycle and Start together for 5 seconds. The last error shows on the display. Turn power off at the breaker for 60 seconds to reset the board.
Clear the log after a repair so you can tell whether the fault has really gone.
FAQ
What does C4 mean on the GE Appliances dishwasher?
Overfill / filled twice after power failure. Too much water got in. The inlet valve is not closing fully, or the float switch that stops the fill is stuck. It can also be logged once after a power cut.
Can I fix C4 myself?
DIY difficulty: moderate. Reset at the breaker. If it was a one-off after an outage, it will not return. Check the float in the tub floor moves freely and is not stuck with debris.
How much does it cost to fix C4?
Inlet valve $25 to $50; float switch $10 to $20. A home visit from an appliance technician runs $120 to $250 for diagnosis plus the part. Boards are the expensive part; sensors and switches are cheap.
Is it worth repairing?
Yes.
When does C4 typically show up?
GE Appliances dishwashers report C4 any. That timing is a useful clue when narrowing the cause.
Can I keep using the machine with C4 showing?
Usually you can finish the drink you are making, but do not ignore it — the underlying fault rarely heals itself. Work through the cheap checks first.
Will C4 clear on its own?
Sometimes. Try the reset and cleaning steps first — they cost nothing and clear the milder cases. A code that returns within a day or two needs the parts fix.
How long does the repair take?
Thirty minutes to an hour if you are comfortable opening the case; budget an afternoon the first time.
Code meanings are compiled from manufacturer service references and repair documentation for the GDT / GDF / GDP / Profile / Cafe; fixes follow documented repairs and owner reports. Model revisions can differ. If your appliance is under warranty, contact the manufacturer before opening it.