Hotpoint Fridge Error Code E5: Ambient Temperature... | appliancefaults.com

Technical Background:

The E5 error code on a Hotpoint refrigerator typically indicates an issue with the ambient temperature sensor circuit. The MCU (Microcontroller Unit) on the control board monitors the voltage signal from the ambient temperature sensor. This sensor provides a resistance value that varies with temperature. If the MCU detects a voltage outside of the expected range or a short/open circuit, it triggers the E5 error code.

Symptoms:

The homeowner observes the refrigerator is not cooling properly and is displaying an error code E5 on the control panel. The error may appear intermittently or constantly.

Possible Causes:

Faulty ambient temperature sensor
Wiring harness issue between the sensor and the control board
Loose connection at the sensor or control board
Defective control board (MCU)
Environmental conditions outside operating range
Power surge damaging the sensor circuit

Solution:

1

Disconnect the refrigerator from the 120V AC power supply by unplugging it or switching off the breaker in the breaker panel.
2

Locate the ambient temperature sensor, typically near the top of the refrigerator compartment. Consult the service manual for exact location.
3

Using a multimeter, check the resistance of the sensor. A typical reading at room temperature (70-75°F) should be around 5-10k ohms. Refer to the service manual for the exact specification.
4

Inspect the wiring harness and connector for any signs of damage or corrosion. Repair or replace as needed.
5

Check the voltage at the sensor connector on the control board with the refrigerator plugged in (exercise extreme caution). You should typically see around 5V DC. If the voltage is absent, the control board may be faulty.
6

If the sensor tests outside of its specified range, replace the ambient temperature sensor with a new, OEM replacement part.
7

After replacing the sensor, plug the refrigerator back in or turn on the breaker. Monitor the refrigerator for proper operation and ensure the E5 error code is cleared.

Safety Warning:

Disconnect power to the appliance before performing any repairs. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. Be aware of high voltage components within the refrigerator and take appropriate safety precautions to avoid electrical shock.

Prevention:

Regularly clean the condenser coils (located at the back or bottom of the refrigerator) to ensure proper airflow and prevent overheating. This helps the refrigerator operate efficiently and reduces stress on the components, including the temperature sensors. Avoid placing the refrigerator in direct sunlight or near heat sources.

Expert Tip:

Some Hotpoint models have a service mode that allows you to manually test the ambient temperature sensor and view its readings. Consult the service manual for the specific sequence to enter service mode for your model. This can help to pinpoint the problem faster.

Frequently Asked Questions

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

The location varies by model, but it's often behind the control panel at the top of the refrigerator compartment, or near the evaporator fan. Refer to your model's service manual or parts diagram for the exact location.

•What is the correct resistance range for the ambient temperature sensor at 40 degrees Fahrenheit?

The resistance value will vary depending on the specific sensor used in your model. Consult the technical specifications sheet for your refrigerator or the sensor itself. Often, a chart is provided showing resistance values at various temperatures.

•If the wiring harness looks intact, how can I test it for continuity?

Disconnect the refrigerator from power. Then, using a multimeter set to the continuity setting (or resistance), test each wire in the harness individually, from the sensor connector to the corresponding pin on the control board connector. You should hear a beep or see a low resistance reading (close to 0 ohms) if the wire is continuous. If there is no continuity, the wire is broken and needs to be repaired or replaced.

Hotpoint Fridge Error Code E5: Ambient Temperature Sensor Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

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

•What is the correct resistance range for the ambient temperature sensor at 40 degrees Fahrenheit?

•If the wiring harness looks intact, how can I test it for continuity?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: