KitchenAid Dishwasher Error Code F6E6

F6E6 indicates that the dishwasher is detecting incoming water that is cooler than 18°C (65°F), which is below the minimum temperature required for proper operation. The control board monitors water temperature through a thermistor and triggers this fault when the threshold is not met. This is most often a supply-side issue rather than a failed part, and it can frequently be resolved without any repairs.

Running a dishwasher with incoming water below 18°C can result in poor cleaning performance, incomplete detergent activation, and inadequate sanitization. It is best to resolve the water temperature issue before continuing to use the dishwasher. The machine may also interrupt or refuse to complete cycles while the fault condition is active.

Resetting the dishwasher may temporarily clear the fault code, but the error will return if the underlying cause has not been addressed. If the incoming water temperature is still below 18°C on the next fill cycle, the control board will detect the condition again and re-trigger F6E6. Resolve the hot water supply issue first, then reset or restart the dishwasher for a lasting fix.

Start by running the hot water at your kitchen sink for about one minute before starting the dishwasher, which clears cold water from the supply line. Confirm your water heater is set to at least 49°C (120°F) and verify the dishwasher's supply hose is connected to the hot water valve under the sink. If the error continues after addressing these supply issues, the inlet thermistor may need to be tested and possibly replaced.

If the fix is simply running the sink before each cycle or adjusting the water heater setting, there is no parts cost involved. If the inlet thermistor has failed and needs replacement, parts and labor costs typically range from $100 to $250 depending on your location and the service provider. Plumbing corrections to re-route the supply connection to the hot water line may add additional cost.