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Error code reference

Bosch Refrigerator Error Code F24

Temperature in the cool-fresh compartment was colder than -2°C for 15 minutes.

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Temperature in the cool-fresh compartment was colder than -2°C for 15 minutes.

First step from the service manual

Check if the air flap opens; check consumption values.

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

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What F24 means on a Bosch refrigerator

The F24 error code on a Bosch refrigerator indicates that the temperature inside the cool-fresh compartment dropped below -2°C and remained there continuously for 15 minutes. The cool-fresh zone is a dedicated section of the refrigerator designed to maintain temperatures just above freezing, typically between 0°C and 3°C, to preserve perishables like meat, fish, and dairy. When the compartment overshoots this range into sub-zero territory for an extended period, the control board logs F24 and alerts the user that the cooling system is not regulating this zone correctly.

The primary component to inspect first is the air flap that controls airflow into the cool-fresh compartment. This flap modulates the amount of cold air entering the zone from the evaporator circuit. If the flap is stuck in the open position, an excessive volume of cold air floods the compartment continuously, driving the temperature well below the setpoint. A stuck or failed flap actuator motor is one of the most common causes of this fault. The diagnostic step also calls for checking consumption values, which refers to measuring the electrical current or resistance of the flap actuator to determine whether it is receiving correct signals and responding properly.

Additional causes can include a faulty temperature sensor in the cool-fresh compartment reporting inaccurate readings, or a control board issue sending incorrect commands to the flap actuator. Wiring faults between the control board and the flap motor can also prevent the flap from closing on command. A thorough diagnosis should confirm whether the flap physically moves through its full range, whether sensor resistance values fall within spec, and whether the actuator draws appropriate current during operation.

Source: manufacturer service documentation.

Common causes of F24

  1. 01

    Air flap stuck open

    Part replacement

    The flap that regulates cold airflow into the cool-fresh compartment may be mechanically jammed or have a failed actuator motor, causing it to remain open and allow continuous freezing air to enter. Inspect the flap visually for ice buildup or physical obstruction, and check whether it moves when commanded.

  2. 02

    Faulty flap actuator motor

    Part replacement

    The actuator motor that drives the air flap open and closed may have failed electrically, leaving the flap in a fixed open position. Checking the consumption values (current draw and resistance) of the actuator will reveal whether it is operating within specification.

  3. 03

    Defective cool-fresh compartment temperature sensor

    Part replacement

    If the temperature sensor in the cool-fresh zone is reading incorrectly or is shorted, the control board may not recognize that the compartment has reached the correct temperature and will continue cooling. Resistance testing of the sensor will confirm whether its values match expected specs for a given temperature.

  4. 04

    Ice buildup blocking flap movement

    Wiring / connection

    Ice accumulation around the air flap mechanism can prevent it from closing fully, allowing cold air to flow into the compartment uncontrolled. Manually defrosting the area around the flap and checking for any ice obstruction is a straightforward first check that requires no parts.

  5. 05

    Wiring or control board fault

    Wiring / connection

    Damaged wiring between the control board and the flap actuator, or a fault on the control board itself, can prevent the correct signal from reaching the flap motor. Inspect connectors and wiring harnesses for corrosion, breaks, or loose terminals before condemning the board.

See the test procedure for each cause

Frequently asked questions about F24

What does F24 mean on a Bosch refrigerator?
F24 on a Bosch refrigerator means the cool-fresh compartment temperature fell below -2°C and stayed there for at least 15 minutes. This signals that the cooling system is over-cooling that specific zone, which is most often caused by an air flap that is stuck open or a failed flap actuator. The error is logged by the control board after the 15-minute threshold is reached and will typically trigger an alert on the display.
Can I fix the F24 error myself?
Some causes of F24, such as ice blocking the air flap, can be addressed by carefully defrosting the compartment area and checking for physical obstructions. However, replacing a flap actuator motor or temperature sensor requires disassembly of the compartment interior and basic electrical testing skills. If you are not comfortable measuring component resistance or working with refrigerator internals, a qualified technician is the safer option.
Is it safe to keep using my refrigerator while it shows F24?
Continuing to use the refrigerator with an active F24 code carries the risk of freezing food stored in the cool-fresh compartment, which can damage perishables. The rest of the refrigerator may continue operating normally, but the affected compartment should not be relied on for temperature-sensitive items until the fault is resolved. It is best to remove food from the cool-fresh zone until repairs are complete.
Will resetting the refrigerator clear the F24 error code?
A power reset may temporarily clear the F24 code from the display, but if the underlying problem such as a stuck air flap or failed actuator is still present, the error will return once the compartment drops below -2°C again for 15 minutes. A reset is useful as a first step to confirm whether the fault is persistent or intermittent, but it does not repair the root cause.
How much does it cost to repair a Bosch refrigerator F24 error?
Repair costs depend on the failed component and whether you use a professional technician. A flap actuator motor replacement typically ranges from moderate to higher parts cost, and combined with a service call, total repair bills can range from around $150 to $400 or more depending on your region and labor rates. If only a sensor or wiring repair is needed, costs may fall on the lower end of that range.

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