Whirlpool WRX735SDHZ Refrigerator Error Code F5 E2:... | appliancefaults.com

Technical Background:

The F5 E2 error code on a Whirlpool WRX735SDHZ refrigerator indicates a communication failure between the User Interface (UI) board and the Main Control Board (MCU). The MCU sends signals to the UI to control display and user input functions. This error arises when the UI fails to properly communicate or acknowledge commands from the MCU. Voltage paths must be intact and stable for data transfer to occur.

Symptoms:

The homeowner reports the refrigerator is displaying an F5 E2 error code on the user interface. The refrigerator may or may not be cooling properly.

Possible Causes:

Defective User Interface (UI) board.
Loose or damaged wiring harness connecting the UI board to the Main Control Board.
Faulty Main Control Board.
Software Glitch within the Main Control Board.
Intermittent power supply issues to the refrigerator.

Solution:

1

Disconnect power to the refrigerator at the breaker panel.
2

Locate the User Interface (UI) board. Typically found in the refrigerator door.
3

Inspect the wiring harness and connections between the UI board and the Main Control Board for any signs of damage or looseness. Re-seat any loose connections.
4

Using a multimeter, test the voltage supply to the UI board. You should measure approximately 12V DC. If voltage is absent or significantly lower, investigate the Main Control Board.
5

Check the Main Control Board, located at the rear of the refrigerator. Inspect for burnt components or signs of water damage.
6

If all wiring and voltage checks are good, attempt to reset the refrigerator by disconnecting power for 5 minutes and then reconnecting.
7

If the F5 E2 error persists, replace the User Interface (UI) board. If the error continues, replace the Main Control Board.

Safety Warning:

Always disconnect power to the refrigerator at the breaker panel before performing any troubleshooting or repairs. High voltage is present within the refrigerator's components. Follow Lock-Out/Tag-Out (LOTO) procedures.

Prevention:

Periodically check the refrigerator's ventilation grilles to ensure they are free from dust and debris. Proper ventilation prevents overheating of the Main Control Board.

Expert Tip:

Some Whirlpool refrigerators have a diagnostic mode. Simultaneously press and hold the “Door Alarm” and “Light” buttons for 3 seconds. This may clear the error or provide additional diagnostic information.

Frequently Asked Questions

•What is the exact voltage I should be measuring at the UI board?

You should be measuring approximately 12V DC at the UI board's power connector. Refer to the wiring diagram for the exact pins to test.

•Where is the Main Control Board located on my WRX735SDHZ refrigerator?

The Main Control Board is typically located at the rear of the refrigerator, behind an access panel. You'll need a 1/4-inch nut driver to remove the panel.

•If I replace the Main Control Board, does it require programming?

Some Whirlpool Main Control Boards require programming after replacement. Refer to the service manual for specific programming instructions for your WRX735SDHZ model. Use a USB drive with the updated firmware.

Whirlpool WRX735SDHZ Refrigerator Error Code F5 E2: Troubleshooting Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the exact voltage I should be measuring at the UI board?

•Where is the Main Control Board located on my WRX735SDHZ refrigerator?

•If I replace the Main Control Board, does it require programming?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: