Roper Refrigerator Error Code E1: Sensor Failure... | appliancefaults.com

Technical Background:

The Roper refrigerator's Main Control Unit (MCU) monitors the temperature sensor voltage. The sensor's resistance changes with temperature, creating a variable voltage signal. The MCU interprets this signal to regulate cooling. An E1 error signals the MCU detects an out-of-range or nonexistent voltage from the sensor circuit.

Symptoms:

The homeowner may observe the refrigerator is not cooling properly, the freezer is warmer than usual, or the E1 error code is displayed on the control panel. Food spoilage might also be a concern.

Possible Causes:

Faulty refrigerator temperature sensor
Wiring harness issue between the sensor and the main control board
Defective main control board (MCU)
Sensor not properly seated or connected
Excessive frost build-up interfering with sensor readings

Solution:

1

Unplug the refrigerator from the outlet or turn off the breaker.
2

Locate the refrigerator temperature sensor, typically near the evaporator coil or in the fresh food compartment.
3

Inspect the wiring harness and connector for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
4

Using a multimeter, measure the resistance of the sensor. Refer to the Roper service manual for the correct resistance value at room temperature (typically 77°F). An open or shorted sensor indicates a fault.
5

If the wiring and sensor appear to be good, suspect a faulty main control board. Replacing the main control board may be required.
6

After completing repairs, plug the refrigerator back in or turn on the breaker. Monitor the refrigerator to ensure the E1 error code does not return.
7

Allow 24 hours for the refrigerator to reach its optimal temperature.

Safety Warning:

Disconnect power to the refrigerator before performing any troubleshooting or repairs. Capacitors in the control board can store a dangerous electrical charge even when unplugged. Use caution when working near electrical components.

Prevention:

Regularly defrost the refrigerator to prevent excessive frost build-up. Inspect the door seals to ensure a proper seal, preventing warm air from entering. Clean the condenser coils at least twice a year to ensure efficient cooling.

Expert Tip:

Some Roper refrigerators have a service mode that allows you to directly test the temperature sensor reading. Refer to the technical service manual to enter service mode and check sensor values. This can help isolate the problem faster.

Follow-up Questions:

Frequently Asked Questions

•What is the typical resistance range for the refrigerator temperature sensor at 70°F?

The specific resistance range varies by model, but typically it is between 5,000 and 10,000 ohms at 70°F. Consult the service manual for your specific Roper refrigerator model.

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

The main control board is usually located behind a panel at the back of the refrigerator. You may need to remove screws to access it. Ensure the refrigerator is unplugged before accessing the control board.

•If the sensor tests good with a multimeter, what else could be causing the E1 error?

If the sensor tests good, the problem may lie in the wiring harness between the sensor and the main control board, or the main control board itself. Check for continuity in the wires, and if the wiring is good, the main control board is likely the cause of the error.

Roper Refrigerator Error Code E1: Sensor Failure Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for the refrigerator temperature sensor at 70°F?

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

•If the sensor tests good with a multimeter, what else could be causing the E1 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: