KitchenAid Cooktop Error Code F-40

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.

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.

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.

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.

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.