U-Line Refrigerator Error Code E4

Error Code E4 on your U-Line refrigerator indicates an issue with Thermistor 4. The thermistor is a crucial component responsible for monitoring the temperature in specific areas of the refrigerator. When the thermistor detects an open circuit or fails to provide accurate temperature readings, it triggers the E4 error.

Possible Causes:

1. Faulty Thermistor: The thermistor itself may be defective, leading to an open circuit.
2. Wiring Issues: Damaged or disconnected wiring between the thermistor and the refrigerator’s control board.
3. Control Board Malfunction: The main control board, responsible for processing temperature data, may be faulty.

Troubleshooting Steps:

1. Inspect Thermistor Wiring: Check for any visible damage or loose connections in the wiring connected to Thermistor 4.
2. Test Thermistor Resistance: Use a multimeter to measure the resistance of Thermistor 4. If the reading is infinite (indicating an open circuit), the thermistor needs replacement.
3. Replace Faulty Thermistor: If the thermistor is confirmed to be defective, replace it with a compatible part following the manufacturer’s guidelines.
4. Check Control Board: If the issue persists, there may be a problem with the control board. Consult the refrigerator’s service manual or seek professional assistance.

Note: Error Code E4 demands attention to ensure the accurate monitoring of temperatures within the refrigerator. If troubleshooting steps do not resolve the issue, it is advisable to consult a qualified technician for a thorough diagnosis and resolution.