Admiral Refrigerator Not Cooling, But Freezer Works:... | appliancefaults.com

Technical Background:

The refrigerator's main control unit (MCU) monitors temperature sensors (thermistors) in both the freezer and refrigerator compartments. Based on these readings, the MCU controls the compressor, evaporator fan motor, damper control, and defrost system. The damper control regulates the flow of cold air from the freezer into the refrigerator. Voltage paths supply power to the fan motor, damper, and defrost components.

Symptoms:

The refrigerator section is not cooling properly, while the freezer is working normally. Food in the refrigerator is not staying cold, but ice cream in the freezer is solid.

Possible Causes:

Faulty damper control assembly
Failed evaporator fan motor
Defrost system malfunction (heater, thermostat, timer)
Blocked air vents between freezer and refrigerator
Refrigerant leak (less likely, but possible)
Thermistor malfunction

Solution:

1

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

Inspect the damper control: Open the refrigerator and locate the damper control, usually at the top back. Ensure it opens and closes freely. If stuck or damaged, replace it.
3

Check the evaporator fan motor: In the freezer section, remove the back panel to access the evaporator fan. Check for ice buildup. If clear, test the fan motor for continuity using a multimeter. Replace if faulty. A reading of infinite resistance (open circuit) indicates a bad motor.
4

Test the defrost system: Use a multimeter to test the defrost heater for continuity. A lack of continuity indicates a bad heater. If the heater is good, check the defrost thermostat; it should show continuity when cold (below 40 degrees Fahrenheit). The defrost timer (if present) can be manually advanced to initiate a defrost cycle. Replace any failed components.
5

Check for blocked vents: Ensure that the air vents between the freezer and refrigerator compartments are not blocked by food items. Clear any obstructions.
6

Verify thermistor operation: Locate the thermistor, usually near the evaporator. Test its resistance using a multimeter. Compare the reading to the refrigerator's service manual specifications for the ambient temperature. Replace if the resistance is significantly off.
7

Plug the refrigerator back in or turn the breaker back on.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. High voltage is present within the appliance. Follow Lock-Out/Tag-Out (LOTO) procedures to ensure the power remains off during the repair process.

Prevention:

Regularly clean the refrigerator coils (condenser coils) located at the back or bottom of the unit with a vacuum cleaner brush attachment. This improves heat exchange efficiency. Also, avoid overpacking the refrigerator, which can restrict airflow.

Expert Tip:

Many Admiral refrigerators have a service mode that allows you to manually test components. To access the service mode, look for a specific button sequence, often involving pressing and holding multiple buttons simultaneously (check the tech sheet behind the kick plate).

Follow-up Questions:

Frequently Asked Questions

•How do I find the correct replacement parts for my Admiral refrigerator?

Locate the model number inside the refrigerator compartment (usually on a sticker). Use this model number to search for compatible parts at appliance parts retailers.

•What resistance should I expect to see when testing the defrost heater?

The resistance of the defrost heater will vary depending on its wattage. A typical defrost heater might read between 20 and 40 ohms. An open circuit indicates a failed heater.

•Where is the thermistor located and how do I test it properly?

The thermistor is usually located near the evaporator coil. To test it accurately, measure its resistance and compare it to the resistance chart in the service manual for the current ambient temperature.

Admiral Refrigerator Not Cooling, But Freezer Works: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I find the correct replacement parts for my Admiral refrigerator?

•What resistance should I expect to see when testing the defrost heater?

•Where is the thermistor located and how do I test it properly?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: