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

Technical Background:

error code 6-6 on an Amana dishwasher typically indicates that the Main Control Unit (MCU) has detected that the water temperature is not reaching the minimum required temperature for the wash cycle within a specified timeframe. This fault is monitored by a thermistor that sends a voltage signal back to the MCU. If the voltage falls outside the programmed range, the 6-6 error is triggered. The MCU relies on proper voltage readings from the thermistor to accurately determine water temperature. Improper readings cause the MCU to activate the error code and shut down proper operation.

Symptoms:

The homeowner reports the Amana dishwasher displays error code 6-6 during or shortly after the wash cycle begins. The dishes are not cleaned properly, and they may feel cold to the touch. The dishwasher may also run for an extended period. The user notices the water entering the dishwasher doesn't seem hot enough.

Possible Causes:

Faulty water inlet valve not fully opening.
Defective heating element.
Malfunctioning thermistor.
Low incoming water temperature.
Wiring harness issues between the thermistor and the MCU.
A problem with the MCU itself (less common).

Solution:

1

Verify incoming water temperature. It should be at least 120°F. Check the water heater setting and test the water temperature at a nearby faucet with a thermometer.
2

Disconnect power to the dishwasher at the breaker panel. Lock Out/Tag Out (LOTO) the breaker.
3

Locate the thermistor, usually at the bottom of the dishwasher tub. Disconnect the thermistor connector and test the thermistor resistance using a multimeter. Compare the reading to the values specified in the service manual for the dishwasher. Typically expect to see a resistance of around 10k ohms at room temperature.
4

Inspect the heating element for continuity using a multimeter. If there is no continuity, the heating element is faulty and needs to be replaced.
5

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

Check the voltage to the heating element during the wash cycle using a multimeter. You should measure approximately 120V AC. If voltage is present but the element is not heating, the element is likely bad.
7

If all other components test good, the MCU may be faulty. Replacing the MCU should be considered as a last resort.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) the breaker to prevent accidental re-energization. High voltage is present in the dishwasher, posing a risk of electric shock. Wear appropriate safety gear, including insulated gloves.

Prevention:

Run hot water at the sink before starting the dishwasher. This ensures that the dishwasher is filled with hot water from the beginning of the cycle. Periodically check the water heater temperature and ensure it's set to at least 120°F.

Expert Tip:

Many Amana dishwashers have a service mode that allows you to run diagnostic tests, including heating element and thermistor tests. To access the service mode, simultaneously press and hold the 'High Temp Wash' and 'Heated Dry' buttons for 3 seconds. Consult the service manual for the specific sequence and available tests.

Follow-up Questions:

Frequently Asked Questions

•Where is the thermistor located in my Amana dishwasher?

The thermistor is typically located at the bottom of the dishwasher tub, often near the heating element. It's usually a small, cylindrical component with two wires connected to it. Consult your dishwasher's parts diagram for the exact location.

•How do I test the thermistor with a multimeter?

Disconnect power to the dishwasher and unplug the thermistor connector. Set your multimeter to measure resistance (Ohms). Connect the multimeter probes to the thermistor terminals. Compare the resistance reading to the value specified in the service manual at a known temperature (e.g., room temperature). A significantly different reading indicates a faulty thermistor.

•What if I'm getting 120V AC to the heating element, but the water is still not heating?

If you're getting the correct voltage to the heating element but the water isn't heating, the heating element is likely defective. The element itself may be broken internally, preventing it from generating heat even when voltage is applied. Replace the heating element with a new one.

Amana Dishwasher Error Code 6-6: Water Too Cold Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the thermistor located in my Amana dishwasher?

•How do I test the thermistor with a multimeter?

•What if I'm getting 120V AC to the heating element, but the water is still not heating?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: