GE Dishwasher C4 error code
C4 means the dishwasher filled twice after a power failure, and the control suspects the float switch is stuck or has failed, or that the drain or sump is clogged. The float switch is the overflow-protection device, so the machine is guarding against overfilling.
Last updated: September 30, 2026
What causes the C4 error?
- Float switch stuck in the raised position
- Clogged sump or drain area
- Failed float switch after a power event
How to fix GE C4 — step by step
Work through these in order, from simplest and safest first. Stop as soon as the code clears.
- Cancel and reset the cycle
Touch START and then CANCEL/RESET on the control panel to clear the current state. - Tap the float cover to unstick the float
Find the plastic float cover (it looks like an upside-down cup in the front-left corner of the tub floor) and gently tap it to free a stuck float. - Check the sump for debris
Look at the sump area in the back-bottom of the tub (it resembles an upside-down silverware basket) and remove any debris clogging it.Safety warning: Turn off power at the breaker before putting your hands in the tub to clear debris.
When to call a technician
- C4 persists after the float is freed and the sump is clean
- The float switch feels damaged or does not move at all
Frequently asked questions
What does C4 mean on a GE dishwasher?
C4 means the dishwasher filled twice after a power failure, usually because the float switch is stuck or the drain/sump is clogged. Freeing the float and clearing the sump normally fixes it.
Sources
Every meaning and fix above was checked against official manufacturer documentation:
FixCode provides general troubleshooting information only — not professional repair advice. If you are unsure about any step, stop and call a qualified technician. Repairs done incorrectly can be dangerous and may void your warranty.