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Error code reference

Bosch Refrigerator Error Code 4-4-1

Ice maker

Bosch codesBosch refrigerator codes

Ice maker: Internal ice maker fault.

First step from the service manual

Switch appliance off and on; if fault persists, replace ice maker.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What 4-4-1 means on a Bosch refrigerator

Error code 4-4-1 on a Bosch refrigerator indicates an internal ice maker fault. This means the ice maker module itself has reported a failure condition that originates within the unit rather than from an external sensor or water supply issue. The ice maker assembly contains its own control logic, motor, heater, and thermostat components, and when any of these sub-components fail to operate within expected parameters, the module generates this internal fault signal.

The most direct diagnostic path outlined for this code is a power cycle reset. Switching the appliance off, waiting briefly, and powering it back on can clear transient electronic faults caused by voltage fluctuations or momentary communication errors between the main control board and the ice maker module. If the fault clears after a reset and the ice maker resumes normal operation, no further action may be needed. However, if the 4-4-1 code returns immediately or after a short time, the fault is persistent and points to a hardware failure within the ice maker assembly.

When a reset does not resolve the error, the ice maker module itself is the identified failed component and should be replaced as a complete unit. Internal faults of this type typically involve the ice maker's integrated circuit board, harvest cycle motor, or internal thermistor, none of which are individually serviceable on most Bosch ice maker assemblies. Replacement of the entire ice maker module is the recommended corrective action for a persistent 4-4-1 fault.

Source: manufacturer service documentation.

Common causes of 4-4-1

  1. 01

    Failed ice maker control board

    Part replacement

    The ice maker's integrated circuit board can fail due to age, moisture exposure, or electrical surges, causing it to report an internal fault. This is the most common hardware cause of a persistent 4-4-1 code.

  2. 02

    Defective harvest cycle motor

    Part replacement

    The motor responsible for rotating the ice ejector arms may seize or fail internally, preventing the harvest cycle from completing and triggering an internal fault. Listen for unusual sounds or no movement during the harvest cycle.

  3. 03

    Internal thermistor failure

    Part replacement

    The ice maker contains a built-in thermistor that monitors temperature during the freeze and harvest cycles. If this sensor fails or reads out of range, the module can generate an internal fault code.

  4. 04

    Transient electronic glitch

    Wiring / connection

    A temporary voltage fluctuation or communication error between the main control board and the ice maker module can trigger a false 4-4-1 code. A power cycle reset will resolve this if no hardware has actually failed.

  5. 05

    Ice maker heater failure

    Part replacement

    The internal heater used to release ice from the mold during harvest can fail, causing the ice maker to fault internally when the harvest cycle cannot complete. This requires replacement of the ice maker assembly.

See the test procedure for each cause

Frequently asked questions about 4-4-1

What does 4-4-1 mean on a Bosch refrigerator?
The 4-4-1 code on a Bosch refrigerator indicates an internal ice maker fault. The fault originates within the ice maker module itself rather than from an external component like a water valve or temperature sensor. The first step is to power cycle the refrigerator; if the code persists, the ice maker assembly requires replacement.
Can I fix the 4-4-1 error on my Bosch refrigerator myself?
The initial step, switching the refrigerator off and back on, is something any homeowner can do safely. If the code returns after the reset, the ice maker module needs to be replaced, which is a more involved repair requiring disconnecting the unit and installing a new assembly. A technician with appliance repair experience is recommended for the replacement if you are not comfortable working with refrigerator components.
Will resetting my Bosch refrigerator clear the 4-4-1 error code?
A reset will clear the 4-4-1 error if the fault was caused by a transient electronic glitch such as a power fluctuation. However, if the ice maker has a physical hardware failure, the code will return after the reset. A reset that does not hold is a clear sign that the ice maker module itself has failed and needs to be replaced.
Is it safe to use my Bosch refrigerator while the 4-4-1 error is showing?
The 4-4-1 code is specific to the ice maker and does not affect the refrigerator's main cooling functions. Your food and refrigerator compartment should remain unaffected. The ice maker will likely stop producing ice while the fault is active, but continuing to use the refrigerator for cooling is generally safe while you arrange for diagnosis or repair.
How much does it cost to fix a 4-4-1 error on a Bosch refrigerator?
If the fault requires a full ice maker module replacement, parts alone typically range from roughly $80 to $250 depending on the specific Bosch model. Adding professional labor, total repair costs generally fall in the range of $150 to $400. Costs can vary based on your location, the service provider, and part availability for your specific model.

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