What to check, in order
- Run the hot tap first
Run the tap next to the dishwasher before you start it, to clear the cold water out of the pipe.
- Check the water heater
Adjust its temperature. GE's manuals give 120°F (49°C) as the minimum and 150°F (66°C) as the maximum for the water going in.
- Don't share the hot water
Avoid running the washing machine or taking showers while the dishwasher runs.
- Choose a longer option
Options that make the dishwasher run longer let it add more heat.
When to call an engineer
Only if the water going in is hot enough and C6 keeps appearing.
Quick answers
What does the GE C6 error code mean?
The water coming into the dishwasher is too cold. GE says it should be at least 120°F (49°C).
Can I fix GE C6 myself?
Very easy (about 5 minutes). Start with: run the hot tap first; check the water heater; don't share the hot water. Only if the water going in is hot enough and C6 keeps appearing.
Is GE C6 worth repairing?
Not a fault. Nothing to repair. It's the water supply, not the dishwasher.
Checked against
- GE Appliances: dishwasher error, fault and function codes
- GE Appliances: dishwasher owner's manual 49-4000283 (PDF)
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.