What C4 means
The machine filled twice after a power failure, the float switch is stuck or failed, or the drain or sump is clogged.
Likely causes
- Stuck float
- Debris in the sump area
- Clogged drain
Safe first checks
- Touch Start and then Cancel/Reset.
- Tap the float cover (the plastic upside-down cup in the front left corner of the tub floor) so the float can move freely.
- Check the sump area at the back bottom of the tub for debris.
When to stop
If the problem persists, contact service.
Checked against: GE Appliances: Dishwasher - Error, Fault or Function Codes. Codes can differ by model and year, so confirm with your owner's manual.