Applies to: dishwasher.
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 | Part prices are not published by the manufacturer. Ask a parts supplier or service centre for a current price. |
|---|---|
| Service | Service prices vary by region and are not published by the manufacturer. Ask an authorised service agent for a quote before booking a visit. |
| Worth repairing? | Yes. |
How to check the error log
GE does not publish a consumer diagnostic-mode sequence for its dishwashers. Service-mode entry differs by model and lives in the technical service manual for your model number (printed on the tub or door edge). Button sequences circulating online are model-specific and often wrong, and service mode can run pumps, valves and heaters, so we do not list them. GE's own reset is: Start/Reset, wait two minutes, then switch off at the breaker for about 30 seconds.
Clear the log after a repair so you can tell whether the fault has really gone.
Beyond the fix
Tips and tricks
- Tap the float cover gently to free it. GE lists this among its first steps for C4.manufacturer manual
- Look for food debris in the sump at the back of the tub, which GE says can clog.manufacturer manual
- A technician walkthrough of GE codes repeats the float tap and sump check as the owner-safe steps, and says to call service otherwise.owner video
Common mistakes
- Pulling the float cover out forcefully instead of tapping it.
- Ignoring the code after a power cut, since it describes the tub filling twice.
Easily confused with
- C5 uses the same float tap but means the pump-out was too short.
Further reading
Questions
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?
Part prices are not published by the manufacturer. Ask a parts supplier or service centre for a current price. Service prices vary by region and are not published by the manufacturer. Ask an authorised service agent for a quote before booking a visit.
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.