KitchenAid Dishwasher Error Code 6-6: Water Too Cold &... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) monitors the water temperature via the thermistor. If the MCU detects that the water is not reaching the required temperature within a specific timeframe, or the thermistor readings are outside the acceptable range, it will trigger error code 6-6. The voltage path from the MCU to the heating element relay must be intact for proper heating.

Symptoms:

The homeowner notices the dishwasher displays error code 6-6. The dishes are not clean, and the water doesn't feel hot during the wash cycle. The dishwasher may run through its cycle, but the dishes are still greasy and food particles remain.

Possible Causes:

Faulty heating element
Defective thermistor (temperature sensor)
Problem with the wiring harness or connections to the heating element or thermistor
Malfunctioning control board (MCU)
Low incoming water temperature
Stuck or failing heating element relay on the control board

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Locate the heating element (usually at the bottom of the dishwasher tub). Visually inspect for damage or scaling.
3

Using a multimeter, check the heating element for continuity. A good heating element will typically read between 10-30 ohms.
4

Locate the thermistor. Disconnect it and test its resistance using a multimeter. Compare the reading to the manufacturer's specifications at room temperature (typically around 75°F, the resistance should be in the kilo-ohm range).
5

Inspect the wiring harness and connectors leading to the heating element and thermistor for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
6

Check the voltage at the heating element terminals during the heating cycle using a multimeter. You should read approximately 120V AC. If no voltage is present, suspect a faulty control board or a wiring issue.
7

If all components test good, the control board (MCU) is likely the problem and needs replacement.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Lock-out/Tag-out (LOTO) procedures should be followed. High voltage is present when the dishwasher is operating. Ensure the dishwasher is properly grounded.

Prevention:

Periodically check the incoming water temperature to ensure it is at least 120°F. Use a water softener if the water is hard to prevent scaling on the heating element. Run a dishwasher cleaning cycle with a dishwasher cleaner every month.

Expert Tip:

To access the service mode on some KitchenAid dishwashers, press the following sequence within 6 seconds: High Temp Wash, Heated Dry, High Temp Wash, Heated Dry. This may provide additional diagnostic information and error codes.

Frequently Asked Questions

•What is the typical resistance range for a KitchenAid dishwasher thermistor at room temperature (75°F)?

The resistance should typically be in the kilo-ohm range, usually between 10k ohms and 50k ohms, but consult the specific model's service manual for exact specifications.

•If I measure 0V AC at the heating element terminals during the heating cycle, what are the most likely causes?

The most likely causes are a faulty heating element relay on the control board, a broken wire in the wiring harness, or a problem with the control board itself.

•Where can I find the technical specifications, including resistance values and voltage requirements, for my specific KitchenAid dishwasher model?

The best place to find this information is in the service manual for your specific dishwasher model. You can often find these manuals online or by contacting KitchenAid directly.

KitchenAid Dishwasher Error Code 6-6: Water Too Cold & Heating Element Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for a KitchenAid dishwasher thermistor at room temperature (75°F)?

•If I measure 0V AC at the heating element terminals during the heating cycle, what are the most likely causes?

•Where can I find the technical specifications, including resistance values and voltage requirements, for my specific KitchenAid dishwasher model?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: