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Error code reference

GE Dishwasher Error Code F23

Check AC volts to inverter.

GE codesGE dishwasher codes

Check AC volts to inverter.

First step from the service manual

Check AC volts to inverter, replace inverter if OK.

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

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What F23 means on a GE dishwasher

The F23 error code on a GE dishwasher indicates a problem detected with the AC voltage supply reaching the inverter board. The inverter is a power conversion component responsible for driving the wash motor, converting incoming AC power into the controlled electrical signal the motor needs to operate at variable speeds. When the control detects that AC voltage to the inverter is absent, insufficient, or out of specification, it triggers F23 to flag a potential power delivery fault in this circuit.

The diagnostic approach specified for F23 starts with measuring the actual AC voltage at the inverter's input terminals. If the voltage readings are within the expected range and the inverter is receiving proper power, the inverter board itself is considered faulty and should be replaced. This two-step logic is important: it separates a wiring or supply problem from a failed inverter component, preventing unnecessary part replacement.

Common causes include loose or corroded wiring harness connections between the control board and the inverter, a damaged wiring harness with broken conductors, a failed inverter board, or an upstream issue with the household power supply delivering incorrect voltage to the appliance. A thorough inspection of all connectors and wiring in the inverter circuit is essential before condemning the inverter board itself.

Source: manufacturer service documentation.

Common causes of F23

  1. 01

    Loose or corroded wiring connector at the inverter

    Wiring / connection

    The wiring harness connector that supplies AC voltage to the inverter can work loose over time or develop corrosion at the terminals, interrupting the voltage supply. Inspect all connectors at the inverter for signs of burn marks, corrosion, or loose fit.

  2. 02

    Failed inverter board

    Part replacement

    If AC voltage is confirmed present and correct at the inverter input but F23 persists, the inverter board itself has likely failed internally. Replacement of the inverter board is the indicated repair in this scenario.

  3. 03

    Damaged wiring harness

    Part replacement

    A wiring harness with broken, pinched, or chafed conductors between the main control board and the inverter can prevent proper AC voltage from reaching the inverter. Inspect the full length of the harness for visible damage.

  4. 04

    Insufficient household supply voltage

    Wiring / connection

    If the outlet or circuit supplying the dishwasher is not delivering proper AC voltage, the inverter will not receive adequate power. Check the outlet voltage with a multimeter and inspect the home's breaker for the dishwasher circuit.

See the test procedure for each cause

Frequently asked questions about F23

What does F23 mean on a GE dishwasher?
F23 on a GE dishwasher means the control has detected a problem with the AC voltage being supplied to the inverter board. The inverter drives the wash motor, so this fault will typically prevent the dishwasher from running a wash cycle. The first step in diagnosing this code is to measure the actual AC voltage at the inverter's input terminals to determine whether the issue is a wiring or supply problem, or a failed inverter board.
Can I fix the F23 error on my GE dishwasher myself?
Diagnosing F23 involves working with AC voltage inside the appliance, which requires proper safety precautions and a multimeter. A knowledgeable DIYer comfortable with electrical testing can check the wiring harness connections and measure voltage at the inverter. However, if the inverter board needs replacement, sourcing the correct part and installing it safely is the final repair step. If you are not confident working with live AC circuits, a qualified appliance technician should perform this diagnosis.
Is it safe to use my GE dishwasher when it shows error code F23?
No, you should not attempt to run the dishwasher while F23 is active. The code indicates a fault in the power delivery circuit to the inverter, and continued operation could cause further damage to the inverter board, wiring, or connected components. Leave the dishwasher powered off until the fault is diagnosed and repaired.
Will resetting my GE dishwasher clear the F23 error code?
A reset may temporarily clear the F23 code, but if the underlying fault in the AC voltage supply or the inverter board is still present, the code will return when the dishwasher attempts to run. Resetting without repairing the root cause is not a solution. The wiring, connectors, and inverter board need to be inspected and tested to resolve the fault permanently.
How much does it cost to repair a GE dishwasher with an F23 error?
Repair costs for F23 depend on what component needs attention. If the issue is a loose connector or minor wiring repair, costs may be limited to a service call fee, typically in the range of $75 to $150. If the inverter board needs replacement, parts alone can range from $100 to $300 or more depending on the model, with total repair costs including labor potentially reaching $200 to $450. Getting a diagnostic quote before authorizing parts replacement is recommended.

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