GE Dishwasher C6 Error: Water temperature too low
This guide covers GE dishwasher C6 error in detail to help you diagnose and resolve the issue. What Does GE Dishwasher Error Code C6 Mean? Error code C6 means the dishwasher’s water temperature sensor measured a temperature below the minimum required for the active wash cycle. GE Profile (PDT/GDP), standard GE (GDT), and GE Café […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Washing at below-minimum temperatures fails to sanitize dishes or dissolve grease properly. Resolve the water temperature issue before running a full load of dishes, especially for infant items or cutting boards.
Can I reset the code?
Yes. C6 clears with a circuit breaker reset (30–60 seconds off). If the root cause was cold incoming water, pre-running the faucet and resetting is sufficient. If the heating element or thermistor is faulty, the code will return on every cycle.
When to stop immediately?
Stop if you notice: C6 returns on every cycle even after pre-heating the water supply line, Dishes remain cold to the touch immediately after the wash phase.
Symptoms You May Notice
Dishes come out with greasy film or food residue
Cold water cannot dissolve grease or activate dishwasher detergent enzymes effectively, leaving a cloudy or greasy film on dishes even after a full wash cycle.
C6 displayed during or after wash phase
The control panel shows "C6" typically during the main wash or sanitize phase when the water temperature is measured and falls below the cycle minimum (usually 120°F / 49°C).
Cycle takes much longer than usual
The dishwasher may extend the wash phase waiting for the heating element to raise the water temperature. If it cannot reach the target within the allowed time, C6 triggers.
Water feels cool when entering the tub
If you run the kitchen faucet before starting, you can feel whether hot water is reaching the sink. Cold incoming water (e.g., after a long period of non-use) is a common cause of C6.
Possible Causes
Household hot water supply below 120°F
If the water heater is set below 120°F or the hot water line runs cold before reaching the dishwasher (first use of the day, long pipe runs), the incoming water starts too cold for the heating element to compensate.
DIY PossibleFailed or weak heating element
The dishwasher's internal heating element cannot raise cold incoming water to the required wash temperature within the cycle time limit. Element failure is common after 7–10 years of use.
Requires ProfessionalFaulty thermistor (temperature sensor)
The NTC thermistor sends incorrect (too-low) temperature readings to the control board, triggering C6 even when the water is at proper temperature.
Requires ProfessionalSafe Checks You Can Do
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1
Pre-run the kitchen faucet before starting
Turn the kitchen faucet to the hottest setting and let it run for 60 seconds until hot water flows. Then immediately start the dishwasher. This ensures hot water (not cold water sitting in the pipes) is the first to fill the tub.
This single step resolves C6 in a large percentage of cases, especially on first-use-of-the-day cycles or after the home's water has been off.
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2
Check water heater temperature setting
Locate your water heater and check the temperature dial. GE recommends a minimum of 120°F (49°C) for optimal dishwasher performance. If set lower, raise the temperature carefully — but not above 140°F to avoid scalding risks.
A simple kitchen thermometer placed under the kitchen faucet at full hot can confirm the actual delivery temperature.
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3
Reset and run a normal cycle after pre-heating
After pre-running the faucet, turn the circuit breaker off for 30 seconds to clear the C6 code, restore power, and run a Normal or Heavy cycle. If C6 does not return, the incoming water temperature was the cause.
If you select a Sanitize cycle, the required temperature is higher (150°F / 66°C) — cold water supply issues are more likely to trigger C6 on Sanitize than on Normal.
When to Call a Professional
Contact a qualified technician if:
- Hot water supply confirmed at 120°F+ but C6 still appears — thermistor or element fault
- Heating element shows visible damage (cracks, discoloration, corrosion)
- Thermistor resistance reads out of specification with a multimeter
Need Professional Help?
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