The 6H error on your GE Dishwasher means the control board detected that the water did not heat to the correct temperature within the allowed time during the cycle. This is usually caused by a household water heater set too low, a faulty heating element, or a failed thermistor, and most homeowners can check the simple causes before calling for service.

Error code 6H
Meaning Water heating circuit failed to reach target temperature in time
Severity Medium — dishwasher will usually stop or pause the cycle until resolved
Time to fix 15–45 minutes
Tools needed Multimeter, screwdriver, thermometer (optional)

What the 6H error means

GE dishwashers monitor water temperature throughout the wash cycle using a thermistor connected to the control board. If the water fails to reach the required temperature within a set time window, the control board flags this as a 6H fault and may pause, skip a step, or end the cycle early.

This code doesn’t always mean a broken part — often it’s simply that the incoming water wasn’t hot enough to begin with, so the dishwasher’s heater couldn’t make up the difference in time.

Common causes

  • Household water heater thermostat set too low (below 120°F)
  • Cold water sitting in the pipes because the dishwasher isn’t run soon after other hot water use
  • Faulty or failing heating element inside the dishwasher tub
  • Defective thermistor sending incorrect temperature readings to the control board
  • Loose or corroded wiring connections at the heating element or thermistor
  • Control board fault preventing the heater circuit from engaging properly

How to fix the 6H error

  1. Check your water heater setting: Set your home’s water heater to at least 120°F and run the kitchen hot tap until it’s hot before starting the dishwasher.
  2. Run hot water first: Run the kitchen sink tap on hot for 30–60 seconds before starting the dishwasher so the incoming water is already warm.
  3. Reset the dishwasher: Turn off power at the breaker for 5 minutes, then restore power and run a normal cycle to see if the code clears.
  4. Test the heating element: With power disconnected, use a multimeter to check the heating element for continuity; replace it if it reads open or infinite resistance.
  5. Inspect the thermistor and wiring: Check the thermistor connector for corrosion or looseness, and test its resistance against manufacturer specs; replace if out of range.
  6. Call a technician: If the element and thermistor test fine but the code persists, the control board may need replacement — this is best handled by a qualified appliance repair professional.

FAQ

Can I still use my dishwasher if it shows a 6H error?
Yes, in most cases it will still run, but dishes may not be washed at the ideal temperature and cycles may take longer or end early.

Does the 6H error mean the heating element is broken?
Not always. It often means the water simply wasn’t hot enough going in. Check your home water heater setting before assuming a part has failed.

How do I know if the thermistor is bad?
A multimeter test comparing the thermistor’s resistance to the manufacturer’s specification chart at a known water temperature will confirm if it’s reading correctly.

If you’re troubleshooting other GE or Maytag appliance codes, these guides may help: Ge Washing FL Error Code: Causes and Fixes, Ge Washing IE Error Code: Causes and Fixes, Ge Washing OE Error Code: Causes and Fixes, Ge Washing UE Error Code: Causes and Fixes, and Maytag Washer F1 Error Code: Causes and Fixes.