Admiral Refrigerator Error Code E2: Freezer Sensor... | appliancefaults.com

Technical Background:

The main control unit (MCU) monitors the freezer thermistor's voltage. The thermistor's resistance changes with temperature, affecting the voltage signal sent to the MCU. An E2 error code indicates that the MCU is receiving an abnormal voltage signal from the thermistor circuit, indicating a potential fault in the sensor or wiring.

Symptoms:

The homeowner observes that the refrigerator displays an E2 error code. The freezer may not be cooling properly, or the refrigerator compartment may also be affected. Food may be spoiling prematurely.

Possible Causes:

Faulty freezer thermistor
Wiring harness issue between the thermistor and the main control board
Defective main control board
Ice buildup around the thermistor
Open or shorted wiring to the freezer sensor
Loose connection at the main control board or sensor.

Solution:

1

Disconnect power to the refrigerator at the breaker panel.
2

Locate the freezer thermistor (usually near the evaporator coil). It's often a small, glass-encapsulated sensor.
3

Inspect the wiring and connections to the thermistor for any damage or corrosion.
4

Using a multimeter, measure the resistance of the thermistor. Compare the reading to the thermistor's resistance chart (usually found in the service manual or online). A typical value at room temperature (77°F) is around 5-10k ohms.
5

If the thermistor's resistance is significantly off or reads open/shorted, replace the thermistor with a new one.
6

Check the wiring harness between the thermistor and the main control board for continuity. Use a multimeter to check for breaks in the wires.
7

If the wiring is good and the thermistor tests okay, the main control board may be faulty. Replacing the main control board is often necessary, but ensure all other components are verified first.

Safety Warning:

Always disconnect the refrigerator from the power source (breaker panel) before performing any repairs. Refrigerators contain high-voltage components. Use caution and follow proper lockout/tagout (LOTO) procedures.

Prevention:

Regularly defrost the freezer to prevent ice buildup around the thermistor. Inspect the refrigerator's door seals to ensure they are sealing properly, preventing warm air from entering and causing excessive ice formation. Also, avoid overloading the freezer, which can restrict airflow and affect temperature regulation.

Expert Tip:

After replacing the thermistor or control board, it’s a good idea to force a defrost cycle to ensure the system is operating correctly. Some Admiral models have a service mode you can access by pressing a specific sequence of buttons (consult the service manual for the sequence).

Follow-up Questions:

Frequently Asked Questions

•Where exactly is the freezer thermistor located in my Admiral refrigerator model?

The freezer thermistor is typically located near the evaporator coil, often clipped to the coil or placed within a protective housing. Consult the service manual for your specific model for a detailed diagram.

•What is the correct resistance range for the freezer thermistor at different temperatures?

A typical thermistor resistance at 32°F (0°C) is around 15-20k ohms, while at 77°F (25°C) it's around 5-10k ohms. Refer to the thermistor's datasheet or the refrigerator's service manual for the exact resistance chart.

•How do I access the main control board in my Admiral refrigerator to inspect or replace it?

The main control board is usually located in the back of the refrigerator, often behind a metal access panel. Disconnect power before accessing it. Use a 1/4-inch nut driver to remove the screws securing the panel. Exercise caution when handling the board, as it contains sensitive electronic components.

Admiral Refrigerator Error Code E2: Freezer Sensor Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where exactly is the freezer thermistor located in my Admiral refrigerator model?

•What is the correct resistance range for the freezer thermistor at different temperatures?

•How do I access the main control board in my Admiral refrigerator to inspect or replace it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: