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Error code reference

KitchenAid Range Error Code F23

Boil over temperature condition in the steam boiler.

KitchenAid codesKitchenAid range codes

Boil over temperature condition in the steam boiler.

First step from the service manual

Unplug range or disconnect power, then disconnect the boiler sensor and measure resistance between 68°F and 95°F (must be between 130 kΩ and 60 kΩ).

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 KitchenAid range

The F23 error code on a KitchenAid range indicates a boil over temperature condition detected within the steam boiler system. This code is triggered when the boiler's temperature sensor reads a value that suggests the water inside the boiler has reached or exceeded safe operating limits, signaling a potential boil over event. The steam boiler is a critical component in ranges equipped with steam-assisted cooking functions, and its temperature must remain within a controlled range to operate safely and effectively.

The primary diagnostic focus for F23 is the boiler sensor itself. With the range unplugged, the sensor should be disconnected and its resistance measured. At temperatures between 68°F and 95°F, a properly functioning sensor will read between 130 kΩ and 60 kΩ. Readings outside this window point to a faulty sensor that is misreporting temperature data to the control board, causing the board to register a false boil over condition.

Beyond sensor failure, actual boil over conditions can occur due to low water levels, mineral scale buildup on boiler components, or a control board that is incorrectly interpreting sensor data. If the sensor resistance tests within specification, the investigation should shift toward the boiler assembly itself and the electronic control board, which processes the incoming temperature signal and triggers the fault code.

Source: manufacturer service documentation.

Common causes of F23

  1. 01

    Failed boiler temperature sensor

    Part replacement

    The boiler sensor is the most likely culprit. If its resistance falls outside the 130 kΩ to 60 kΩ range at ambient temperatures between 68°F and 95°F, the sensor is defective and must be replaced.

  2. 02

    Mineral scale buildup in the boiler

    Wiring / connection

    Hard water deposits can accumulate on boiler heating elements and walls, causing localized overheating and triggering a legitimate boil over condition even when water is present. Inspect the boiler interior for white or chalky buildup.

  3. 03

    Insufficient water in the boiler

    Wiring / connection

    If the boiler does not have an adequate water supply, it can overheat rapidly. Check that the water reservoir or supply line is properly filled and free of blockages.

  4. 04

    Wiring fault in the sensor circuit

    Wiring / connection

    Damaged, corroded, or loose wiring between the boiler sensor and the control board can cause erratic resistance readings, leading the board to trigger F23. Inspect the wiring harness and connectors for visible damage or poor connections.

  5. 05

    Faulty electronic control board

    Part replacement

    If the boiler sensor tests within specification and wiring is intact, the control board may be misinterpreting the sensor signal. A failed board component in the sensor input circuit can generate a false F23 code.

See the test procedure for each cause

Frequently asked questions about F23

What does F23 mean on a KitchenAid range?
F23 indicates a boil over temperature condition in the range's steam boiler system. The control board has detected that the boiler temperature has reached an unsafe level, either due to an actual overheating event or a faulty temperature sensor sending incorrect data. The range shuts down the affected function to prevent damage or a safety hazard.
Can I fix the F23 error myself?
Some causes of F23 are DIY-friendly. You can start by unplugging the range, disconnecting the boiler sensor, and measuring its resistance with a multimeter. A reading outside the 130 kΩ to 60 kΩ range at 68°F to 95°F confirms a bad sensor that can be replaced. You can also inspect the boiler for scale buildup and check water levels without advanced technical skills.
Is it safe to keep using my KitchenAid range when F23 appears?
You should avoid using the steam boiler function until the fault is resolved. An actual boil over condition in the steam system can damage internal components and create a burn or scalding risk. Standard oven and surface burner functions may still be operable, but confirm the issue is isolated to the boiler before continuing to use the appliance.
Will resetting the range clear the F23 error code?
Disconnecting power may temporarily clear the F23 code, but if the underlying fault persists, the error will return once the boiler system is active again. A lasting fix requires diagnosing and correcting the root cause, whether that is a failed sensor, mineral buildup, or a wiring issue.
How much does it cost to repair a KitchenAid range F23 error?
Repair costs vary depending on the cause. A replacement boiler temperature sensor typically runs in the range of $20 to $60 for the part alone. If the control board needs replacement, parts can range from $150 to $350 or more. Adding professional labor will increase total costs, generally ranging from $100 to $200 per hour depending on your location.

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