Frigidaire Refrigerator Error Code OP

If your Frigidaire refrigerator displays the OP error code, it indicates a potential issue with the freezer temperature sensor.

Follow these steps to diagnose and resolve the problem:

1. Unplug the Refrigerator: Start by disconnecting the refrigerator from the power source to ensure safety during the inspection and repair process.
2. Check Wiring Connections: Inspect the wiring connections between the freezer temperature sensor and the electronic control board. Reconnect any loose or disconnected wires securely.
3. Test Freezer Temperature Sensor: Use a multimeter to measure the resistance of the freezer temperature sensor. Unplug the sensor from its wire harness and measure the resistance at different temperatures:
   • 0 degrees: 84,925 ohms
   • 32 degrees: 32,566 ohms
   • 72 degrees (room temperature): 11,304 ohms

   Replace the sensor if the multimeter shows infinite resistance, indicating a faulty sensor.

4. Check Sensor Wires to Control Board: Plug the temperature sensor back in and measure resistance through the freezer temperature sensor wires connected to the electronic control board. The freezer temperature sensor typically connects via the gray/white wires on the J4A connector.
5. Measure Resistance at Control Board: Unplug the J4A connector from the control board and measure resistance through the gray/white wires. The meter reading should match the resistance values obtained from the temperature sensor.
6. Evaluate Control Board: If the resistance values are correct through the sensor wires but the error persists, there may be an issue with the electronic control board. Consider replacing the control board, as it may not accurately detect sensor resistance.
7. Address Sensor Wiring Failure: In the case of infinite resistance through the sensor wires, there might be a wiring failure. Locate and repair any damaged or faulty wiring to ensure proper sensor functionality.

By following these steps, you can systematically identify and address the root cause of the Frigidaire Refrigerator Error Code OP.