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Error code reference

Whirlpool Washer Error Code F73

UIC microprocessor error

Whirlpool codesWhirlpool washer codes

UIC microprocessor error — UIC microprocessor is not able to read or verify EEPROM (cycles and price display disabled until diagnostic code is manually cleared). Also washer UIC failure — communication error within User Interface Control.

First step from the service manual

Clear error code, unplug washer or disconnect power, wait 2 minutes before reconnecting power, verify UIC by attempting to start a cycle or run diagnostic mode.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F73 means on a Whirlpool washer

The F73 error code on a Whirlpool washer indicates a problem within the User Interface Control (UIC) board, specifically related to the microprocessor's ability to read or write to its onboard EEPROM memory. The EEPROM stores critical operational data including cycle settings and price display parameters. When the UIC microprocessor cannot successfully read or verify this memory, the control disables cycle selection and price display functions as a protective measure. The error persists in the system until it is manually cleared through diagnostic mode.

This fault falls into two related categories: a true EEPROM read/write failure, where the memory chip itself or its connection to the microprocessor has degraded, and a broader UIC communication failure, where internal data signals within the control board are not transmitting correctly. Both conditions point to the UIC board as the primary suspect. Causes can include corrupted EEPROM data from a power surge or brownout, solder joint failures on the control board, moisture or corrosion on the board's internal components, or simply a failed UIC microprocessor.

Because the error can sometimes result from a temporary firmware glitch or a power anomaly rather than a hardware failure, the first diagnostic step is to clear the code, then disconnect power for a full 2 minutes to allow capacitors to discharge and the microprocessor to fully reset. After restoring power, attempting to start a cycle or running the washer's diagnostic mode will confirm whether the UIC is functioning. If the F73 returns immediately or the control remains unresponsive, the UIC board most likely requires replacement.

Source: manufacturer service documentation.

Common causes of F73

  1. 01

    Failed or corrupted UIC EEPROM

    Part replacement

    The EEPROM memory chip on the User Interface Control board has failed or its stored data has become corrupted, often after a power surge or brownout. This prevents the microprocessor from reading cycle and configuration data, and the error will return every time power is restored.

  2. 02

    UIC board internal communication failure

    Part replacement

    Internal signal pathways within the UIC board are not transmitting data correctly between the microprocessor and other board components. This can result from failed solder joints, cracked board traces, or a degraded microprocessor, all of which require board-level diagnosis or board replacement.

  3. 03

    Power surge or transient voltage event

    Wiring / connection

    A sudden voltage spike or an unstable power supply can corrupt EEPROM data or temporarily disrupt the UIC microprocessor. This is the most recoverable cause and may be resolved by clearing the error code and performing a full 2-minute power disconnect.

  4. 04

    Moisture or corrosion on the UIC board

    Part replacement

    Exposure to moisture, whether from a leak or high humidity in the laundry area, can cause corrosion on the UIC board's solder joints or component contacts. Inspect the board for visible corrosion, discoloration, or residue if the unit has a history of water exposure.

  5. 05

    Loose or intermittent UIC wiring connection

    Wiring / connection

    A connector on the wiring harness supplying the UIC board may be partially seated or have a damaged terminal, causing intermittent communication failures that register as an F73. Inspect all connectors at the UIC board for secure seating and signs of pin damage.

See the test procedure for each cause

Frequently asked questions about F73

What does F73 mean on a Whirlpool washer?
F73 indicates that the User Interface Control (UIC) microprocessor is unable to read or verify the EEPROM memory on the control board. As a result, the washer disables cycle selection and price display functions until the code is manually cleared. The code can also signal a broader internal communication failure within the UIC. It will not clear on its own and requires manual intervention through diagnostic mode.
Can I fix the F73 error myself without replacing parts?
You can attempt a reset first by clearing the error code, unplugging the washer, and waiting a full 2 minutes before restoring power. This allows the microprocessor to fully restart and may resolve the issue if the cause was a temporary power event or firmware glitch. If the F73 returns after the reset, the UIC board itself is likely faulty and will need to be replaced, which is a more involved repair. Checking wiring harness connections at the UIC board is also a no-cost step worth doing before purchasing parts.
Is it safe to keep using my Whirlpool washer when the F73 code is showing?
When the F73 error is active, the washer disables cycle selection, which means you will generally not be able to start a wash cycle normally. Attempting to force operation through a partially functional control board is not recommended, as the root cause may involve an unstable control board that could behave unpredictably. It is best to resolve the error before returning the washer to regular use.
How much does it cost to repair a Whirlpool washer with an F73 error?
If the issue is resolved by a reset alone, there is no parts cost. If the UIC board requires replacement, parts typically range from around $80 to $200 depending on the specific model. Adding professional labor for diagnosis and board replacement can bring the total repair cost to approximately $150 to $350. Getting a diagnosis to confirm the UIC is the failed component before purchasing parts is advisable, since other wiring or connector issues can sometimes produce similar symptoms.
Will resetting the washer permanently clear the F73 code?
A reset clears the stored error code from memory and may resolve the issue if it was caused by a temporary power anomaly. However, if the underlying cause is a physically failed EEPROM or a damaged UIC board, the F73 code will return the next time the washer attempts to read its memory, often immediately after power is restored. A permanent fix requires addressing the root hardware failure, which typically means replacing the UIC board.

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