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Error code reference

KitchenAid Cooktop Error Code F-12

Coil under current

KitchenAid codesKitchenAid cooktop codes

Coil under current – failure originates from the power control board affecting only one burner (Type 1).

First step from the service manual

Disconnect power and check for correct connections at T2A - T2B or T3A - T3B on the power control board (whichever connection the burner is plugged into).

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

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What F-12 means on a KitchenAid cooktop

The F-12 error code on a KitchenAid cooktop indicates a coil under-current condition affecting a single induction burner. The fault originates at the power control board and is classified as a Type 1 burner failure. Under-current faults occur when the control board detects that the electrical current flowing through the induction coil is lower than expected for the commanded power level. This discrepancy signals that something is interrupting or reducing the current path between the board and the coil.

The power control board communicates with each burner coil through dedicated terminal connections. For the affected burner, the relevant connection points are the T2A and T2B or T3A and T3B terminal pairs on the power control board, depending on which burner position is faulting. A loose, corroded, or improperly seated connection at these terminals is the most common physical cause of the under-current reading, since even partial contact can reduce current flow enough to trigger the fault.

If the terminal connections check out and are secure, the fault path narrows to either a damaged induction coil or a failing power control board. A compromised coil winding can increase resistance beyond the board's acceptable range, causing the under-current detection. Conversely, the board's own current sensing circuitry may have failed, producing a false under-current reading without any actual coil fault. Systematic component-level testing is necessary to distinguish between these two scenarios.

Source: manufacturer service documentation.

Common causes of F-12

  1. 01

    Loose or poor connection at T2A/T2B or T3A/T3B terminals

    Wiring / connection

    A loose, corroded, or improperly seated wire connection at the relevant terminal pair on the power control board is the most likely cause. Disconnecting power and reseating these connections firmly is the first diagnostic step.

  2. 02

    Faulty induction coil

    Part replacement

    The induction coil beneath the affected burner may have a damaged winding, resulting in abnormal resistance and insufficient current draw. Inspecting and testing the coil for continuity and correct resistance will confirm this.

  3. 03

    Damaged wiring harness between coil and control board

    Part replacement

    The wiring connecting the induction coil to the T2A/T2B or T3A/T3B terminals may be pinched, burned, or broken, reducing current flow. A visual inspection of the harness along its full length can reveal damage.

  4. 04

    Failed power control board

    Part replacement

    The current sensing circuitry on the power control board may have failed, causing it to report an under-current condition even when the coil and wiring are intact. This is diagnosed after ruling out coil and connection faults.

See the test procedure for each cause

Frequently asked questions about F-12

What does F-12 mean on a KitchenAid cooktop?
F-12 indicates a coil under-current fault affecting one induction burner, with the failure originating at the power control board. The board detects that current through the burner coil is below the expected level for the selected power setting. This is classified as a Type 1 burner fault, meaning only one burner is affected. The cooktop will not allow normal operation of that burner until the fault is resolved.
Can I fix the F-12 error myself, or do I need a technician?
The first diagnostic step, checking and reseating the terminal connections at T2A/T2B or T3A/T3B on the power control board, is something a confident DIYer can perform after disconnecting power completely. However, testing the induction coil and power control board for electrical faults requires familiarity with component-level diagnostics and safe handling of high-voltage components. If the connection check does not resolve the fault, a qualified appliance technician is recommended.
Is it safe to keep using the cooktop while the F-12 code is displayed?
The affected burner will not function correctly while the F-12 code is active, and continued attempts to use it could stress the power control board further. Other burners on the cooktop may continue to operate normally, but it is best to have the fault diagnosed promptly. Avoid using the faulting burner until the underlying cause has been identified and corrected.
Will resetting the cooktop clear the F-12 error?
Disconnecting power briefly may temporarily clear the error display, but the F-12 code will return if the underlying cause, such as a loose terminal connection, a defective coil, or a failing control board, has not been addressed. A reset is useful for confirming whether the fault is intermittent, but it is not a repair. The root cause must be identified and corrected to permanently resolve the code.
How much does it cost to repair a KitchenAid cooktop showing F-12?
Repair costs depend on the root cause. If the fix is simply reseating a loose terminal connection, costs are minimal and limited to any service call fee, typically in the range of $75 to $150. Replacing an induction coil or power control board will add parts costs, with total repairs commonly ranging from $200 to $500 or more depending on parts pricing and labor rates in your area.

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