Amana Fridge Error Code E5: Ambient Temperature Sensor... | appliancefaults.com

Technical Background:

The MCU (Microcontroller Unit) on the main control board monitors the ambient temperature sensor's resistance to determine the surrounding temperature. The sensor is typically a thermistor, whose resistance changes with temperature. The MCU uses this resistance value and a voltage divider circuit (typically a 5V DC circuit with a pull-up resistor) to read the voltage signal which correlates to the temperature. An E5 code indicates the voltage is outside the expected range.

Symptoms:

The Amana refrigerator displays the E5 error code on the control panel. The refrigerator may not be cooling properly, or the compressor may be running continuously.

Possible Causes:

Defective ambient temperature sensor
Wiring harness issue between the sensor and the main control board
Loose connection at the main control board
Faulty main control board
Extreme ambient temperature conditions impacting sensor readings

Solution:

1

Unplug the refrigerator from the 120V AC outlet.
2

Locate the ambient temperature sensor (typically near the top of the refrigerator compartment). Visually inspect the sensor and wiring for damage.
3

Using a multimeter, measure the resistance of the sensor. Refer to the Amana service manual for the correct resistance value at the current ambient temperature (typically around 5k to 10k ohms at room temperature).
4

If the sensor resistance is outside the specified range, replace the sensor.
5

Check the wiring harness and connector from the sensor to the main control board for continuity. Repair any broken or damaged wires. A 5/16-inch nut driver might be needed to access the control board.
6

Inspect the connection at the main control board. Reseat the connector to ensure a good connection. Check for corrosion on the connector pins.
7

If all other components check out, the main control board may be faulty and require replacement.

Safety Warning:

Disconnect power to the refrigerator at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed to prevent accidental re-energizing of the circuit. Some components may carry high voltage even when the refrigerator is unplugged.

Prevention:

Regularly clean the refrigerator coils to ensure proper airflow and cooling. This will prevent the refrigerator from working harder and potentially stressing the ambient temperature sensor. Ensure the refrigerator is not located in an area with extreme temperatures.

Expert Tip:

Some Amana refrigerators have a diagnostic mode. Entering this mode (refer to the service manual for the specific sequence – often a combination of button presses) will allow you to read the ambient temperature sensor value directly and bypass the error code display, providing further diagnostic information.

Frequently Asked Questions

•Where is the ambient temperature sensor located in my Amana refrigerator model?

The ambient temperature sensor is typically located near the top of the refrigerator compartment, often behind a plastic cover or near the control panel. Consult your refrigerator's service manual for the exact location.

•How do I access the main control board in my Amana refrigerator?

The main control board is usually located at the back of the refrigerator, behind an access panel. You may need to remove several screws (often with a 1/4-inch nut driver) to remove the panel. Disconnect power before accessing the control board.

•What is the typical resistance range of the ambient temperature sensor at room temperature (70-75°F)?

The resistance range is typically between 5k ohms and 10k ohms at room temperature. However, it is essential to refer to the Amana service manual for your specific model to obtain the precise resistance value.

Amana Fridge Error Code E5: Ambient Temperature Sensor Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where is the ambient temperature sensor located in my Amana refrigerator model?

•How do I access the main control board in my Amana refrigerator?

•What is the typical resistance range of the ambient temperature sensor at room temperature (70-75°F)?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: