GE · Dishwasher
GE Dishwasher C7 Error Code
Water temperature sensor inoperative
What this error means
C7 means the water temperature sensor circuit failed per GE fault table.
How C7 is detected
C7 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.
Thermistor unplugged is a leading trigger. Start with reseat thermistor under tub. Rotate the drum or spray arm by hand when powered off—it should move without grinding. Grinding confirms mechanical obstruction; free rotation with repeated C7 on light loads suggests hall sensor, motor, or inverter board failure requiring professional diagnosis.
Common causes
- Thermistor unplugged
- Open sensor
- Corroded connector
- Scale on bulb
Step-by-step fixes
- 1Reseat thermistor under tub
- 2Clean sensor tip
- 3Compare ohms to chart
- 4Prime hot water before cycle
When to call a technician
Out-of-range thermistor needs replacement.
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 C7.
- Record when C7 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 C7; GE uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting C7; reversed plugs on pumps and valves cause immediate repeat faults.