GE · Dishwasher Moderate
C4 — Overfill / Filled Twice After Power Loss
C4 indicates a water overfill condition — the dishwasher filled twice (often after a power interruption), or the float/sump is reporting too much water. Check the float for free movement and the sump for debris, and the water inlet valve for proper shutoff. It is not a water-circulation-verification code.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Verified against
- geappliances.com ↗
How to fix it
- Remove lower rack, spray arms, and filter; clear chopper area of debris.
- Spin the wash impeller by hand — it should turn freely.
- Clean the turbidity sensor lens (small clear window in the sump) with a soft cloth and vinegar.
- Inspect harness connectors at the wash pump and sensor.
- If pump hums or is silent with proper voltage, replace the circulation/wash motor assembly.
Why it happens
Typical signs: C4 mid-cycle · Dishes not cleaning · Quiet operation (pump not running) · Cycle stalls
- Blocked spray arms or chopper Glass shards or large food chunks bound the chopper/wash impeller.
- Failed wash motor Open winding, seized bearing, or failed start capacitor on the circulation pump.
- Dirty turbidity sensor Sensor lens fouled with food film, giving false readings.
- Loose wiring at motor or sensor Connector unseated in the sump area from prior service.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More GE dishwasher codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: geappliances.com.