Maytag Refrigerator Freezing Food: Troubleshooting and... | appliancefaults.com

Technical Background:

The Main Control Unit (MCU) regulates the temperature in the refrigerator based on input from thermistors (temperature sensors). It controls the damper, which allows cold air from the freezer to flow into the fresh food section. A faulty thermistor or damper can cause the MCU to misinterpret the temperature and over-cool the fresh food section. Voltage typically ranges from 5V DC to 12V DC on the thermistor circuit.

Symptoms:

The homeowner observes that food in the fresh food section of their Maytag refrigerator is freezing, even though the temperature setting appears to be normal. Ice may form on the back wall of the fresh food compartment.

Possible Causes:

Thermistor malfunction
Damper control assembly failure
Airflow obstruction
Main Control Board (MCU) defect
Improper temperature settings

Solution:

1

Unplug the refrigerator or turn off the breaker in the breaker panel.
2

Locate the damper control assembly, typically at the back of the fresh food section. Inspect for physical damage or blockage.
3

Use a multimeter to test the thermistor's resistance. Reference the service manual for the correct resistance value at the current temperature.
4

Check for airflow obstructions. Make sure food items are not blocking vents.
5

If the thermistor tests good and the damper is functioning, suspect the Main Control Board (MCU). Replace with a new board, ensuring the part number matches.
6

Verify temperature settings are appropriately set. Consult the user manual for recommended settings. Lower settings prevent excessive cooling.
7

Plug the refrigerator back in or turn the breaker on and monitor its performance.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to prevent accidental energization. Some components may carry 120V AC; exercise caution.

Prevention:

Regularly clean the refrigerator's interior, including vents, to ensure proper airflow. Avoid overpacking the refrigerator, which can also obstruct airflow. Periodically check the temperature settings to ensure they are appropriate for the season.

Expert Tip:

Many Maytag refrigerators have a service mode that allows you to run diagnostic tests and check sensor readings. To enter service mode, simultaneously press and hold the 'Freezer Temp' and 'Refrigerator Temp' buttons for 3 seconds. Refer to the service manual for specific diagnostic codes and tests.

Frequently Asked Questions

•What is the typical resistance range for the fresh food thermistor at 37 degrees Fahrenheit?

The resistance range varies by model, but generally falls between 2k to 10k ohms at 37°F. Consult the specific service manual for your Maytag refrigerator model.

•How do I manually test the damper control assembly?

Visually inspect the damper for physical damage or obstruction. Some dampers have a manual override. Consult the service manual for damper motor voltage requirements and test the motor using a multimeter. Typically 12V DC.

•Where can I find the service manual for my Maytag refrigerator?

You can typically find the service manual online by searching for your model number followed by 'service manual'. Maytag's website or appliance parts retailers are good resources.

Maytag Refrigerator Freezing Food: Troubleshooting and Solutions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for the fresh food thermistor at 37 degrees Fahrenheit?

•How do I manually test the damper control assembly?

•Where can I find the service manual for my Maytag refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: