FixByModel
C4

GE C4: Overfill or float error after power loss

The dishwasher filled with water twice or detected an overfill condition, often after a power failure. A stuck overfill float is a common trigger.

DIY fix

By the FixByModel editorial team · Verified 2026-09 · Researched against manufacturer support & repair references (below)

Most likely causes

  1. Overfill float stuck in the up position by food debris or residue
  2. Recent power interruption during a cycle
  3. Debris in the sump affecting the float or sensor
  4. Failing water inlet valve letting in too much water
Where water collects
1Door gasket
2Hoses & sump
3Base tray
4Float switch

Schematic illustration of a typical dishwasher — not your exact model.

Before you start — unplug the appliance and turn off the water supply. You'll be working near water and electrical parts, and drained water can be hot. If a step involves the pump, wiring, or opening the cabinet and you're unsure, stop and call a qualified technician.

Step-by-step fix

1Reset the cycleCancel the current cycle and restart the dishwasher to clear the condition.
2Free the floatLocate the small float cover on the tub floor and gently tap it so the float moves freely.
3Clean the sumpRemove the filter and clear away debris around the float and sump.
4Run a test cycleStart a normal cycle and watch that the fill stops at the correct level.
5Call for serviceIf C4 returns, schedule service to check the inlet valve and float switch.

Still showing C4?

If you’ve worked through every step and C4 keeps returning, an internal part likely needs testing and replacement. That’s a job for a qualified appliance technician, who can measure the suspect part against the service-manual spec before replacing it.

Which models this applies to

GE dishwashers. GE and GE Profile dishwashers with electronic controls

FAQ

What does GE C4 mean?

Overfill or float error after power loss. The dishwasher filled with water twice or detected an overfill condition, often after a power failure. A stuck overfill float is a common trigger.

What causes GE C4?

The most likely cause is overfill float stuck in the up position by food debris or residue. Other causes include Recent power interruption during a cycle; Debris in the sump affecting the float or sensor; Failing water inlet valve letting in too much water.

Can I fix GE C4 myself?

Usually yes. Start by working through the steps above, beginning with: cancel the current cycle and restart the dishwasher to clear the condition.