The KitchenAid dishwasher 6-6 error code usually means the appliance is receiving water that’s too cold for proper washing. You may notice longer wash cycles, poorly cleaned dishes, or a cycle that doesn’t finish as expected.
Fortunately, this problem can sometimes be fixed without replacing any parts. Checking your hot water supply, water heater, and dishwasher settings can help you identify what’s causing the error.
What Does the KitchenAid Dishwasher 6-6 Error Code Mean?
The KitchenAid dishwasher 6-6 error code, also known as F6E6 on certain models, indicates that the dishwasher has detected an unusually low incoming water temperature.
Many KitchenAid dishwashers are designed to receive water at approximately 120°F (49°C). Some older models can report this error when the incoming water temperature falls below approximately 84°F (29°C). However, the exact temperature threshold depends on the model.
Your dishwasher uses a temperature sensor to monitor water temperature during washing. When the incoming water is too cold, the appliance may require additional heating time or display an error.
Common signs include longer washing cycles, greasy dishes, and poor cleaning results. However, these symptoms can also indicate other problems, so checking the water temperature is the best place to start.
KitchenAid Dishwasher 6-6 Error Code: Common Causes
Several issues can trigger this error, including problems with your household hot water supply and faults inside the dishwasher. Understanding these causes can help you identify the most likely problem.
1. Low Water Heater Temperature
Your KitchenAid dishwasher depends on your home’s hot water supply to provide water at a suitable temperature.
If your water heater is set too low, the dishwasher may receive water that isn’t warm enough for normal washing. As a result, it may take longer to heat the water or display the 6-6 error.
A faulty water heater can also cause this problem. For example, a damaged heating element or thermostat may prevent the heater from maintaining the correct temperature.
If the water from your kitchen faucet never becomes sufficiently hot, check your household water heater before suspecting the dishwasher.
2. Cold Water Sitting in the Supply Pipes
Water left inside your household plumbing gradually cools when it isn’t being used.
If you start your dishwasher after several hours without using hot water, the appliance may initially receive cooled water from the supply pipes.
This is particularly common when the dishwasher is located far from the water heater. The longer the pipe, the more cooled water may need to pass through before hot water reaches the appliance.
Running your kitchen’s hot water faucet before starting the dishwasher can help prevent this problem.
3. Incorrect Water Supply Connection
A dishwasher connected to the wrong water supply line may receive cold water instead of hot water.
This can happen after a new installation, plumbing repair, or kitchen remodeling. Although the dishwasher may still fill and operate, the incoming water may be too cold for the intended washing process.
A faulty plumbing mixing valve can also reduce the temperature of the water entering your dishwasher.
If the error started after installation or plumbing work, have the water supply connection checked.
4. Faulty Temperature Sensor
Your dishwasher uses a temperature sensor called a thermistor to monitor water temperature.
On some KitchenAid models, this sensor is part of the optical water indicator (OWI) assembly.
If the thermistor becomes faulty, it may send incorrect temperature readings to the electronic control board. Consequently, the dishwasher might detect a cold water problem even when the incoming water is sufficiently hot.
You may suspect this issue if your kitchen faucet provides water near 120°F, but the dishwasher repeatedly displays the 6-6 code.
A technician can test the sensor using the specifications for your dishwasher model.
5. Wiring or Electronic Control Problems
Damaged wiring, loose electrical connections, or a faulty electronic control board can interfere with the temperature sensing system.
For example, a loose connection between the thermistor and the control board may cause incorrect temperature readings.
The error may appear intermittently or return after a reset.
However, electronic control failure is less straightforward to diagnose. The temperature sensor and its wiring should be tested before replacing the control board.
KitchenAid Dishwasher 6-6 Error Code: DIY Fixes
Start with the simple checks that don’t require opening your dishwasher. These methods can help resolve common water temperature problems and identify when professional repairs are needed.
1. Check Your Hot Water Temperature
First, confirm that your kitchen faucet delivers water at the recommended temperature.
You’ll need a kitchen thermometer that can measure approximately 120°F.
Follow these steps.
- Turn on the hot water faucet closest to your dishwasher.
- Allow the water to run until it reaches its highest stable temperature.
- Carefully collect some water in a suitable container.
- Use your thermometer to measure the temperature.
- Check whether the reading is approximately 120°F (49°C).
If the water is significantly cooler, your water heater or plumbing may be responsible.
If the temperature is correct, continue with the other troubleshooting methods. Avoid direct contact with very hot water to prevent burns.
2. Run Hot Water Before Starting the Dishwasher
Cold water sitting inside the supply pipes can sometimes contribute to the 6-6 error.
To prevent this, turn on your kitchen’s hot water faucet and allow it to run until the water becomes hot.
Once the temperature stabilizes, turn off the faucet and start your dishwasher immediately.
This helps ensure that the appliance receives warmer water during its initial filling stage.
If the dishwasher completes its cycle without displaying the error, cooled water in the supply line may have contributed to the problem.
However, if the error returns despite having sufficient hot water, another issue may be responsible.
3. Check Your Water Heater Settings
If your faucet temperature is too low, inspect your household water heater settings.
Many KitchenAid dishwashers recommend incoming water around 120°F, which is also a common residential water heater setting.
Check the heater’s temperature display or external controls, following the manufacturer’s instructions.
If the heater is set below the recommended level, adjust it only as permitted by its manual and your household’s safety requirements.
Also, consider whether heavy hot water use has temporarily reduced the available supply. Allowing the heater to recover before starting the dishwasher may help.
If your heater cannot maintain the correct temperature, contact a qualified technician rather than attempting internal electrical or gas repairs.
4. Verify the Dishwasher’s Water Supply Connection
If your kitchen faucet delivers sufficiently hot water but the dishwasher continues showing the error, check whether the appliance is connected to the correct supply line.
Start by locating the dishwasher’s water supply connection beneath your kitchen sink, if it’s visible and safely accessible.
Compare the installation with the requirements in your dishwasher’s manual.
Don’t disconnect pipes or loosen fittings while investigating. If you’re uncertain about the connection, ask a qualified plumber to inspect it.
This check is particularly useful when the error started after installing the dishwasher or completing plumbing work.
5. Reset Your KitchenAid Dishwasher
Sometimes, a temporary control problem may clear after restarting the dishwasher.
However, resetting the appliance won’t repair a faulty temperature sensor or an inadequate hot water supply.
To reset your dishwasher, follow these steps.
- Press Cancel/Drain if a wash cycle is running.
- Allow the dishwasher to finish draining.
- Unplug the appliance if its electrical plug is safely accessible.
- Alternatively, switch off its dedicated circuit breaker.
- Leave the power disconnected for at least one minute.
- Restore power and start a normal washing cycle.
Before running the test cycle, make sure hot water is available at your kitchen faucet.
If the dishwasher completes the cycle normally, monitor the next few washes to see whether the error returns.
If the code keeps appearing, further diagnosis is necessary.
6. Check for Temperature Sensor Problems
If your dishwasher receives water at the correct temperature but continues reporting the 6-6 error, the temperature sensor may need attention.
First, check whether the dishwasher displays any additional fault codes.
On certain older KitchenAid models, codes such as 3-1 and 3-2 can indicate temperature sensing problems. The meaning of these codes may differ between models.
Check your dishwasher’s manual to confirm the correct fault descriptions.
A defective thermistor may need replacement, but the component should be tested before purchasing a new one.
Because testing usually involves internal electrical connections, this repair is best handled by a qualified appliance technician.
7. Contact a Qualified Appliance Technician
If the error persists after checking the hot water supply and resetting the dishwasher, professional diagnosis may be necessary.
A technician can inspect the thermistor, wiring connections, and electronic control board to identify the cause.
Before arranging service, write down your dishwasher’s model number, the displayed error code, and the temperature reading from your kitchen faucet.
This information can help the technician identify the problem without unnecessary parts replacement.
If you notice a burning smell, water leakage near electrical components, or repeated circuit breaker trips, stop using the dishwasher and seek professional assistance immediately.
Wrap-Up
The KitchenAid dishwasher 6-6 error code generally indicates that the appliance is receiving unusually cold water. In some cases, however, a faulty temperature sensor or electrical connection may produce the same warning.
Start by checking your kitchen faucet’s water temperature and confirming that your water heater is working correctly. Running hot water before starting the dishwasher may also help. If the problem continues despite an adequate hot water supply, having the temperature sensing system professionally tested can help you avoid unnecessary repairs.