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Whirlpool Refrigerator Control Board Replacement

Video Guide
This guide was transcribed from a YouTube video.

Introduction

If your Whirlpool bottom-mount refrigerator isn’t defrosting properly, has odd cooling behavior, or won’t shut the compressor off when it should, the control board (also called the main control board) may be failing. This guide shows how to enter Forced Defrost and Service Test modes to help diagnose defrost and compressor-control problems, then how to replace the W10503278 control board and program it so the refrigerator runs correctly.

What you need

  1. Edit

    • Open the refrigerator door and locate the door switch near the user interface at the top of the compartment.

    • Press and hold the door switch to enable hidden diagnostic modes.

    • If the refrigerator has two door switches, press and hold both switches at the same time for every mode in this guide.

  2. Edit

    • Press and hold the door switch or switches.

    • Press the refrigerator minus button three times within six seconds.

    • Release the door switch or switches.

    • Confirm that the display shows FD to verify Forced Defrost mode is active.

  3. Edit

    • Press the refrigerator plus button to toggle between short defrost and long defrost.

    • Press the refrigerator minus button to start Forced Defrost.

    • Wait for the display to return to the normal temperature display showing 4 4.

    • Listen for the compressor and fans to shut off and for the refrigerator damper to close.

    • Leave the door open or closed while the defrost runs.

  4. Edit

    • Go behind the refrigerator and check whether the compressor is still running after Forced Defrost has started.

    • Replace the control board if the compressor continues to run during Forced Defrost.

    • A common failure is a bad relay on the control board that can prevent proper defrost operation.

  5. Edit

    • Reset FD mode by closing the door or toggling the light switch off and on if you don’t want to run defrost yet.

    • Reset only works before pressing the refrigerator minus button to start defrost.

    • Let the unit complete the selected short or long defrost if the display has already returned to 4 4 after starting.

  6. Edit

    • Press and hold the door switch or switches.

    • Press the refrigerator plus button three times within six seconds.

    • Release the door switch or switches.

    • Confirm that the display shows SE.

    • Press the refrigerator plus button once to finalize entry into Service Test mode.

  7. Edit

    • Press the freezer plus and minus buttons to scroll up and down through the test numbers.

    • Use the refrigerator plus and minus buttons to trigger the selected test.

    • Close the door to exit Service Test mode.

    • Press and release the door switch or switches to exit Service Test mode if the door is open.

  8. Edit

    • Remove enough shelves to access the rear of the control housing at the top of the refrigerator compartment.

    • Remove the light cover by sliding it rearward off the housing.

    • Insert a thin flathead screwdriver into the rectangular hole on each side of the control housing.

    • Press each tab down, and pivot the housing downward to release it.

    • Roll the housing rearward to fully pop it out of place once both tabs release.

  9. Edit

    • Check whether the refrigerator is still plugged in before touching any wiring.

    • Use a multimeter with small leads to do voltage or resistance tests at the board if you’re trained to test live circuits safely.

    • Testing from the board can help diagnose issues without disassembling the freezer to reach parts like the defroster.

  10. Edit

    • Unplug the refrigerator from the wall outlet.

    • Disconnect the two wire harnesses from the control board.

    • Use a flathead screwdriver or needle nose pliers to pull the plastic retainers up and away from the board.

    • Lift the board out of the housing once the two or three retainers release.

  11. Edit

    • Snap the replacement PCB apart if it arrives as one flat piece with the interface section attached to the controller section.

    • Install the larger, wider board section into the base of the housing.

    • Install the thinner board section into the user interface area of the housing.

    • Orient the ribbon cable upward toward the top of the housing so the LEDs face the correct direction.

    • Pull the retainer up with needle nose pliers if the interface board is difficult to snap into place.

  12. Edit

    • Reconnect the two wire harnesses to the board.

    • Push each connector straight in until it seats, since the harnesses only fit one way.

    • Slot the front of the housing into the refrigerator chassis.

    • Press the control interface into place until the retaining fingers snap in firmly.

  13. Edit

    • Plug the refrigerator back in and wait 30 seconds for it to boot.

    • Slide the light cover back into place on the top of the housing.

    • Watch for the display to flash 0 0, which indicates the interface needs programming.

  14. Edit

    • Keep the door open, press and hold the door switch or switches until the lights turn off, and keep holding.

    • Press the freezer minus button three times within six seconds.

    • Release the door switch or switches.

    • Confirm that the display shows PE to verify programming mode.

    • Use the freezer plus and refrigerator plus buttons to change the two-digit programming code.

    • Find the correct code on the refrigerator model and serial number plate and set that code on the display.

  15. Edit

    • Press and hold the freezer minus button for three seconds to save the programming code.

    • Watch for the lights to flash off and on, which confirms the code was installed.

    • Press and hold the light switch for a moment, and release it to finish the board installation.

Conclusion

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Author

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Ben Schlichter

Member since: 01/21/25

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