Whirlpool Refrigerator Control Board Replacement
Ben Schlichter and 2 other contributors
Last updated on Jun 4, 2026
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Introduction
Go to step 1 ↓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
Parts
Tools
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Step 1 Prepare for diagnostics
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Open the refrigerator door and locate the door switch near the user interface at the top of the compartment.
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Press and hold the door switch to enable hidden diagnostic modes.
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Step 2 Enter Forced Defrost mode
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Press and hold the door switch or switches.
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Press the refrigerator minus button three times within six seconds.
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Release the door switch or switches.
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Step 3 Select and start Forced Defrost
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Press the refrigerator plus button to toggle between short defrost and long defrost.
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Press the refrigerator minus button to start Forced Defrost.
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Leave the door open or closed while the defrost runs.
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Step 4 Use Forced Defrost to check for a stuck compressor relay
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Go behind the refrigerator and check whether the compressor is still running after Forced Defrost has started.
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Replace the control board if the compressor continues to run during Forced Defrost.
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Step 5 Reset Forced Defrost before starting it
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Reset FD mode by closing the door or toggling the light switch off and on if you don’t want to run defrost yet.
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Step 6 Enter Service Test mode
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Press and hold the door switch or switches.
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Press the refrigerator plus button three times within six seconds.
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Release the door switch or switches.
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Press the refrigerator plus button once to finalize entry into Service Test mode.
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Step 7 Navigate and exit Service Test modes
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Press the freezer plus and minus buttons to scroll up and down through the test numbers.
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Use the refrigerator plus and minus buttons to trigger the selected test.
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Close the door to exit Service Test mode.
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Press and release the door switch or switches to exit Service Test mode if the door is open.
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Step 8 Open the control housing
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Remove enough shelves to access the rear of the control housing at the top of the refrigerator compartment.
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Remove the light cover by sliding it rearward off the housing.
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Insert a thin flathead screwdriver into the rectangular hole on each side of the control housing.
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Press each tab down, and pivot the housing downward to release it.
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Roll the housing rearward to fully pop it out of place once both tabs release.
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Step 10 Remove the control board
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Disconnect the two wire harnesses from the control board.
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Use a flathead screwdriver or needle nose pliers to pull the plastic retainers up and away from the board.
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Lift the board out of the housing once the two or three retainers release.
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Step 11 Prepare and mount the replacement board
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Snap the replacement PCB apart if it arrives as one flat piece with the interface section attached to the controller section.
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Install the larger, wider board section into the base of the housing.
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Install the thinner board section into the user interface area of the housing.
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Pull the retainer up with needle nose pliers if the interface board is difficult to snap into place.
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Step 12 Reconnect the harnesses and reinstall the housing
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Reconnect the two wire harnesses to the board.
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Slot the front of the housing into the refrigerator chassis.
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Press the control interface into place until the retaining fingers snap in firmly.
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Step 13 Power up and confirm programming is required
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Plug the refrigerator back in and wait 30 seconds for it to boot.
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Slide the light cover back into place on the top of the housing.
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Step 14 Enter programming mode and set the model code
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Keep the door open, press and hold the door switch or switches until the lights turn off, and keep holding.
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Press the freezer minus button three times within six seconds.
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Release the door switch or switches.
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Use the freezer plus and refrigerator plus buttons to change the two-digit programming code.
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Find the correct code on the refrigerator model and serial number plate and set that code on the display.
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Step 15 Save the code and finish setup
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Press and hold the freezer minus button for three seconds to save the programming code.
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Press and hold the light switch for a moment, and release it to finish the board installation.
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If the refrigerator responds normally after programming, the board replacement is complete. Recheck connector seating and model-code entry if the interface stays blank or the unit does not return to normal operation. Repair didn't go as planned? Ask our Answers community for help.
