GE Dishwasher Error Code C6 — Low Water Temperature
What this means
The C6 error code on GE dishwashers indicates the water temperature entering the machine is below 120 degrees Fahrenheit. Proper water temperature is essential for dissolving detergent and sanitizing dishes. This is usually caused by a water heater set too low, cold water in the hot water line, or a long run of pipe between the water heater and the dishwasher. In rare cases, the dishwasher's internal temperature sensor or heating element may be faulty.
Step-by-step fix
4 stepsRun the hot water at the kitchen sink first
Before starting the dishwasher, turn on the hot water at the kitchen faucet and let it run until it feels hot — usually 1 to 2 minutes. This purges the cold water from the supply line so the dishwasher fills with hot water from the start.
Test the water temperature with a kitchen thermometer. It should be at least 120 degrees Fahrenheit at the faucet.
Check your water heater temperature setting
Go to your home water heater and check the thermostat setting. For dishwashers, the water heater should be set to at least 120 degrees Fahrenheit. If it is set lower, increase the temperature and wait a few hours for the water to heat up.
Do not set your water heater above 125 degrees Fahrenheit to avoid scalding risk at other faucets in the house.
Check for a long hot water supply run
If your water heater is far from the kitchen, the hot water supply line may be very long, causing significant heat loss. Consider insulating the hot water pipes to retain heat.
In homes with tankless water heaters, there can be a delay before hot water reaches the dishwasher. Always pre-run the hot water at the sink.
Reset the dishwasher and test
After ensuring the hot water supply is adequate, reset the dishwasher by pressing Start/Reset or turning off the breaker for 2 minutes. Start a new cycle and monitor for the C6 code.
If the C6 code persists even with hot water confirmed at the sink, the dishwasher's internal thermistor or heating element may need testing.
When to call a professional
If the incoming water is confirmed hot but the C6 code continues, the dishwasher's temperature sensor or heating element may be faulty. A technician can test these components and replace them if needed.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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