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

Technical Background:

The Main Control Unit (MCU) monitors the freezer temperature via the freezer sensor, which is a thermistor (temperature-sensitive resistor). The MCU sends a low-voltage (typically 5V DC) signal to the sensor and measures the voltage drop across it. The voltage drop changes with temperature. An E2 error code indicates that the MCU is receiving an out-of-range signal from the freezer sensor.

Symptoms:

The refrigerator displays an E2 error code. The freezer temperature may be warmer than usual, or the refrigerator may not be cooling properly. You might also notice ice buildup in the freezer.

Possible Causes:

Faulty freezer sensor
Wiring harness issue (loose connection or damaged wire)
Defective main control board (MCU)
Ice build-up around the sensor
Sensor not properly seated in the thermowell

Solution:

1

Disconnect power to the refrigerator at the breaker panel.
2

Locate the freezer sensor. It's typically behind the freezer back panel. You may need a 5/16-inch socket to remove retaining screws.
3

Inspect the wiring harness connected to the sensor for any damage or loose connections. Use a multimeter to check for continuity.
4

Use a 1/4-inch nut driver to remove the screws securing the freezer back panel.
5

Test the freezer sensor using a multimeter. It should read approximately 5-15k ohms at room temperature (70°F). Refer to the service manual for exact specifications.
6

If the sensor is faulty, replace it with a new Frigidaire OEM part. Ensure it's properly seated in the thermowell.
7

Reassemble the freezer components and restore power to the refrigerator. Monitor for the E2 error code.

Safety Warning:

Disconnect power to the refrigerator at the breaker panel before performing any repairs. Use proper Lock-Out Tag-Out (LOTO) procedures to prevent accidental energization. Be aware of high voltage circuits within the refrigerator.

Prevention:

Regularly defrost the freezer to prevent ice build-up around the sensor. Check the door seals to ensure they are sealing properly. Avoid overloading the freezer, which can restrict airflow.

Expert Tip:

Some Frigidaire models have a diagnostic mode. Press and hold the up and down temperature adjustment buttons simultaneously for 5 seconds. This may allow you to clear the error code after replacing the sensor.

Frequently Asked Questions

•What is the resistance range I should expect from a functioning freezer sensor at 32°F?

At 32°F (0°C), the resistance of a typical Frigidaire freezer sensor should be higher than at room temperature, likely in the range of 10-30k ohms. Refer to the specific service manual for your refrigerator model for exact values.

•How do I access the main control board on this Frigidaire refrigerator?

The main control board is usually located behind the refrigerator, often in an enclosure near the compressor. You'll need to disconnect power and remove the rear access panel to access it. Be careful when handling the board, and be aware of capacitors that can hold a charge.

•If the sensor and wiring are good, what is the likelihood the main control board is faulty, and is there a way to test it?

If the sensor and wiring are verified to be good, a faulty main control board is a likely cause. Testing the board itself is difficult without specialized equipment. You can check for visible signs of damage, like burned components. However, replacement is often the best course of action. First, double-check the sensor harness connection to the board before replacing the main control.

Frigidaire Refrigerator Error Code E2: Freezer Sensor Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the resistance range I should expect from a functioning freezer sensor at 32°F?

•How do I access the main control board on this Frigidaire refrigerator?

•If the sensor and wiring are good, what is the likelihood the main control board is faulty, and is there a way to test it?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: