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Error code reference

GE Dishwasher Error Code F203

A fault has been detected on the machine control board.

GE codesGE dishwasher codes

A fault has been detected on the machine control board.

First step from the service manual

Replace the machine control board.

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

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What F203 means on a GE dishwasher

The F203 error code on a GE dishwasher indicates that the machine control board has detected an internal fault within itself. The machine control board is the central electronic module responsible for coordinating all dishwasher functions, including cycle sequencing, motor control, water inlet valve operation, heating element activation, and communication with the user interface. When the board's onboard diagnostics detect an anomaly it cannot recover from, it triggers F203 to signal that the control system itself is compromised.

This type of fault is self-referential, meaning the component reporting the problem is also the component with the problem. Internal failures on the control board can stem from power surge damage, moisture intrusion causing corrosion on the board's circuitry, solder joint failures from repeated thermal cycling, or component-level failures such as a failed relay, capacitor, or microprocessor. Because the fault originates inside the board, there are no upstream sensors or wiring harnesses to test first.

Given the nature of this code, the diagnostic path skips component testing and goes directly to board replacement. Unlike error codes tied to a specific sensor or actuator, F203 does not point to an external cause that can be resolved through wiring inspection or part substitution elsewhere in the appliance. The control board must be replaced to restore normal dishwasher operation.

Source: manufacturer service documentation.

Common causes of F203

  1. 01

    Internal control board failure

    Part replacement

    The machine control board has suffered an internal component failure such as a failed relay, capacitor, or processor. This is the primary cause of F203 and is confirmed by the board's own self-diagnostic routine.

  2. 02

    Power surge damage

    Part replacement

    A voltage spike from the home's electrical supply can damage the sensitive circuitry on the control board. If F203 appeared shortly after a storm or power outage, surge damage is a likely cause.

  3. 03

    Moisture or corrosion on the board

    Part replacement

    Water infiltration into the control board housing can corrode solder joints and circuit traces, causing the board to fault. Inspect the board for visible corrosion, discoloration, or burned areas before ordering a replacement.

  4. 04

    Thermal cycling degradation

    Part replacement

    Repeated heating and cooling over years of use can cause solder joint micro-fractures on the control board. This leads to intermittent or permanent electrical failures that trigger F203.

See the test procedure for each cause

Frequently asked questions about F203

What does F203 mean on a GE dishwasher?
F203 means the machine control board has detected a fault within itself. The control board is the main electronic module that manages all dishwasher functions, and its internal diagnostics have flagged an unrecoverable error. This code points directly to the control board as the failed component. Replacing the board is the prescribed repair.
Can I fix F203 on my GE dishwasher myself?
Replacing the machine control board is a task many experienced DIYers can perform, as it typically involves disconnecting the wiring harness connectors and swapping the board module. However, working near electrical components requires turning off power to the dishwasher at the breaker before beginning. If you are not comfortable working with appliance electronics, a qualified technician should perform the repair.
Will resetting my GE dishwasher clear the F203 error?
A power reset is unlikely to permanently resolve F203. Because this code is generated by the control board detecting a fault in its own circuitry, the underlying hardware failure will continue to trigger the error after any reset. A reset may temporarily clear the display, but the code will typically return once the dishwasher attempts to run a cycle.
Is it safe to use my GE dishwasher when F203 is displayed?
It is not recommended to continue using the dishwasher while F203 is active. A faulty control board cannot reliably manage cycle functions, which could result in improper water fill, failure to drain, or uncontrolled operation of the heating element. Discontinue use until the control board has been replaced.
How much does it cost to fix a GE dishwasher F203 error?
The cost depends on whether you repair it yourself or hire a technician. A replacement machine control board for a GE dishwasher typically runs anywhere from $80 to $250 or more depending on the model. If you hire a professional, expect to add labor costs ranging from $100 to $200, bringing the total repair estimate to roughly $180 to $450 or more depending on your location and the specific dishwasher model.

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