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Error code reference

KitchenAid Cooktop Error Code F-40

Power control board failure (Type 1 or Type 2).

KitchenAid codesKitchenAid cooktop codes

Power control board failure (Type 1 or Type 2).

First step from the service manual

Disconnect power and check that the cable between the User Interface and the power control board is not damaged and is firmly plugged in.

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

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What F-40 means on a KitchenAid cooktop

The F-40 error code on a KitchenAid cooktop indicates a failure within the power control board, which is the main circuit board responsible for managing heating element output, power distribution, and communication with the user interface. This board receives input signals from the control panel and translates them into precise power delivery commands for the surface burners or induction coils. When the cooktop's internal diagnostics detect an anomaly in this communication or in the board's core functions, it flags the condition as either a Type 1 or Type 2 failure, both of which fall under the F-40 designation.

Type 1 and Type 2 classifications typically reflect different failure modes within the power control board's operation, though both point to the same primary component as the source of the fault. Before concluding the board itself has failed, the cable connecting the user interface to the power control board must be inspected. A loose connector, a pinched wire, or a damaged harness can interrupt the data signal between these two components, causing the board to register a fault condition incorrectly.

If the cable and connectors are intact and properly seated, the power control board itself is the likely source of the failure. Internal board failures can result from power surges, prolonged overheating, or component degradation over time. Because the power control board governs the core electrical functions of the cooktop, this fault will typically prevent normal operation until the underlying issue is resolved.

Source: manufacturer service documentation.

Common causes of F-40

  1. 01

    Loose or damaged interface cable

    Wiring / connection

    The cable connecting the user interface to the power control board may have worked loose or sustained damage, interrupting communication between the two components. Inspect the connector at both ends for secure seating and check the wire harness for pinches, cuts, or burn marks.

  2. 02

    Power control board failure

    Part replacement

    The power control board itself may have failed due to a power surge, overheating, or component degradation. If the cable connection checks out, the board is the primary suspect and will need to be replaced.

  3. 03

    Power surge damage

    Part replacement

    A voltage spike from the home electrical supply can damage sensitive circuits on the power control board. This type of damage is often not visible but will cause persistent fault codes that do not clear after reconnecting power.

  4. 04

    Connector corrosion or contamination

    Wiring / connection

    Moisture or grease contamination at the harness connectors can degrade the electrical contact between the user interface and the power control board. Inspect the connector pins for corrosion, residue, or deformation.

  5. 05

    User interface board failure

    Part replacement

    In some cases, a failed user interface board can disrupt the signal sent to the power control board, triggering the F-40 code. If the power control board and cable both test acceptable, the user interface board should be evaluated as a secondary cause.

See the test procedure for each cause

Frequently asked questions about F-40

What does F-40 mean on a KitchenAid cooktop?
The F-40 code indicates a power control board failure, classified as either Type 1 or Type 2. The power control board manages burner power output and communicates with the user interface. The fault means the cooktop's diagnostics have detected an anomaly in the board's function or in the connection between the board and the control panel. Normal cooktop operation will be interrupted until the issue is resolved.
Can I fix the F-40 error myself, or do I need a technician?
The first step, checking that the cable between the user interface and the power control board is undamaged and firmly connected, is something a knowledgeable DIYer can perform after disconnecting power to the cooktop. If the cable is secure and undamaged, resolving the fault typically requires replacing the power control board, which involves working with high-voltage components and is best handled by a qualified technician. Always disconnect power at the breaker before opening any panels.
Is it safe to use my KitchenAid cooktop while it shows the F-40 code?
Operating the cooktop while the F-40 code is active is not recommended. The fault indicates the power control board is not functioning correctly, which means burner output may be uncontrolled or the cooktop may not respond normally to commands. Discontinue use and disconnect power until the fault is diagnosed and the faulty component is repaired or replaced.
Will resetting the cooktop clear the F-40 error code?
A power reset, achieved by disconnecting power for several minutes and restoring it, may temporarily clear the code if the fault was caused by a transient electrical event. However, if the power control board has a hardware failure or the cable connection is physically damaged, the F-40 code will return once the cooktop is powered back on. A reset is worth attempting but is not a substitute for inspecting and addressing the underlying cause.
How much does it cost to fix a KitchenAid cooktop F-40 error?
Repair costs depend on whether the issue is a loose cable connection or a full power control board replacement. If only a reconnection or cable replacement is needed, costs are relatively low. If the power control board requires replacement, parts and labor combined can range from around $150 to $400 or more depending on the specific cooktop model and local labor rates. Getting a diagnostic assessment from a technician will help determine the most accurate cost for your situation.

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