GE · Dishwasher
GE Dishwasher C15 Error Code
Main control EEPROM or memory fault
What this error means
C15 indicates main control memory or processor fault on extended GE diagnostic list.
How C15 is detected
When C15 appears on a GE dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On GE GDT655SSJSS, GE GDF630PSMSS, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most C15 calls are resolved without parts: breaker off five minutes. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If C15 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Surge
- Water on board
- Brownout
- Failed MCU
Step-by-step fixes
- 1Breaker off five minutes
- 2Dry control if wet
- 3Reseat harnesses
- 4Avoid rapid cycling
When to call a technician
Immediate C15 every start needs main control.
Affected models
- GE GDT655SSJSS
- GE GDF630PSMSS
- GE GDT225SSLSS
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent C15 from lint and food debris buildup.
- Record when C15 appears in the cycle and whether it clears after a 60-second power reset on your GE dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for C15; GE uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting C15; reversed plugs on pumps and valves cause immediate repeat faults.