GE · Dishwasher
GE Dishwasher C6 Error Code
Incoming water temperature too low
What this error means
C6 means water temperature below GE minimum—dishwashers need at least 120°F for proper wash.
How C6 is detected
C6 on GE dishwasher units indicates the drive system did not meet expected performance. Direct-drive washers monitor rotor position with a hall sensor; dryers and dishwashers track motor current draw. When the drum or spray arm fails to turn, the inverter or motor relay shuts down to prevent burned windings. GE GDT655SSJSS, GE GDF630PSMSS, and similar variants may show this fault after an overloaded tub or a foreign object jam.
Water heater set too low is a leading trigger. Start with run faucet 2–3 minutes until hot before start. Rotate the drum or spray arm by hand when powered off—it should move without grinding. Grinding confirms mechanical obstruction; free rotation with repeated C6 on light loads suggests hall sensor, motor, or inverter board failure requiring professional diagnosis.
Common causes
- Water heater set too low
- Long dead-leg plumbing
- Cold tap selected at sink
- Failed dishwasher heater
Step-by-step fixes
- 1Run faucet 2–3 minutes until hot before start
- 2Set water heater to 120–140°F
- 3Select high-temp wash option
- 4Verify heat during wash if model has heater
When to call a technician
C6 with steaming tap at start needs heater element test.
Affected models
- GE GDT655SSJSS
- GE GDF630PSMSS
- GE GDT225SSLSS
Prevention & maintenance
- Avoid washing single heavy rugs or shoes that bind the drum; distribute weight evenly to reduce motor strain that precedes C6.
- Record when C6 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 C6; GE uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting C6; reversed plugs on pumps and valves cause immediate repeat faults.