Roper Refrigerator Error Code E5: Ambient Temperature... | appliancefaults.com

Technical Background:

The MCU (Main Control Unit) monitors the ambient temperature sensor's resistance to determine the refrigerator's surrounding temperature. The MCU uses this data to control compressor operation and defrost cycles. An E5 error indicates that the resistance reading from the sensor is outside the acceptable range or is nonexistent, suggesting a sensor failure or a wiring issue disrupting the voltage path.

Symptoms:

The homeowner observes an E5 error code displayed on the refrigerator's control panel. The refrigerator may not be cooling properly, or the compressor may be running excessively.

Possible Causes:

Faulty ambient temperature sensor
Wiring harness issue (open or short) between the sensor and the main control board
Defective main control board (MCU)
Loose connection at the sensor or the main control board
Extreme ambient temperature conditions affecting sensor readings

Solution:

1

Disconnect power to the refrigerator by unplugging it from the outlet or switching off the breaker at the breaker panel.
2

Locate the ambient temperature sensor. Refer to the Roper refrigerator's service manual for its exact location (typically near the top of the fresh food compartment).
3

Inspect the wiring harness and connectors leading to the sensor for any visible damage, such as frayed wires or loose connections.
4

Using a multimeter, check the resistance of the ambient temperature sensor. Compare the reading with the expected value specified in the service manual for the current ambient temperature. A significantly different reading indicates a faulty sensor.
5

If the sensor tests faulty, replace it with a new, OEM-approved ambient temperature sensor.
6

If the sensor tests within the correct range, reconnect power to the refrigerator and use a voltmeter to check for 5V DC at the sensor connector coming from the main control board. Lack of voltage indicates a problem with the board.
7

If the wiring and sensor are good but the E5 error persists, the main control board may be defective and require replacement by a qualified technician.

Safety Warning:

Always disconnect power to the refrigerator before performing any repairs. Use proper lockout/tagout (LOTO) procedures to prevent accidental re-energizing of the circuit. Be aware of high voltage components within the refrigerator.

Prevention:

Periodically check the refrigerator's temperature settings and ensure proper ventilation around the unit. Avoid placing the refrigerator in areas with extreme temperatures.

Expert Tip:

Many Roper refrigerators have a diagnostic mode. Consult the service manual for the specific button sequence to enter diagnostic mode, which can provide further insights into the problem. Sometimes, simply unplugging the refrigerator for 15 minutes will reset the control board and clear the error code (however, this is not a permanent fix if the sensor is truly failing).

Frequently Asked Questions

•What is the typical resistance range for the ambient temperature sensor at 70 degrees Fahrenheit?

The typical resistance range for the ambient temperature sensor at 70 degrees Fahrenheit is between 2000 and 3000 ohms. Refer to the service manual for the precise specification.

•How do I access the diagnostic mode on this Roper refrigerator model?

The diagnostic mode access varies by model. Typically, it involves pressing a specific sequence of buttons on the control panel within a short timeframe, such as 'Door Switch - Freezer Temp Down - Fridge Temp Up - Door Switch'. Consult the service manual for the precise button sequence for your specific model.

•If the ambient temperature sensor is showing an open circuit, does that always indicate a faulty sensor?

Not necessarily. An open circuit could also indicate a broken wire in the harness leading to the sensor or a loose connection at the sensor or the main control board. Thoroughly inspect the wiring and connections before replacing the sensor.

Roper Refrigerator Error Code E5: Ambient Temperature Sensor Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the typical resistance range for the ambient temperature sensor at 70 degrees Fahrenheit?

•How do I access the diagnostic mode on this Roper refrigerator model?

•If the ambient temperature sensor is showing an open circuit, does that always indicate a faulty sensor?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: