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Error code reference

Bosch Refrigerator Error Code 4-1-1

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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  • Wiring diagram references and connector pinouts from the OEM service manual
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What 4-1-1 means on a Bosch refrigerator

Error code 4-1-1 on a Bosch refrigerator signals an internal ice maker fault. This code indicates the ice maker assembly has detected an internal failure within the unit itself, rather than a problem with water supply, temperature, or an external sensor. The ice maker module contains its own control circuitry, motor drive components, and thermistor elements that work together to manage harvest cycles, tray rotation, and ice ejection. When any of these internal elements fail or report out-of-range readings, the system logs a 4-1-1 fault.

The fault is typically not caused by installation issues or user error. Instead, it points to a failure within the ice maker module itself, such as a seized or failed harvest motor, a failed internal thermistor, or corrupted logic on the ice maker control board. Because the fault originates inside the module, individual component-level repair is rarely practical.

Bosch's recommended first diagnostic step is a power cycle: switch the refrigerator completely off, wait briefly, then power it back on. This can clear transient faults caused by voltage irregularities or temporary signal errors. If the 4-1-1 code returns after the reset, the ice maker assembly is considered defective and should be replaced as a complete unit. Attempting to diagnose individual sub-components within the module is generally not supported by the available service data for this code.

Source: manufacturer service documentation.

Common causes of 4-1-1

  1. 01

    Failed ice maker internal control board

    Part replacement

    The ice maker contains its own control circuitry that manages harvest cycles and motor timing. A failure on this board causes the module to report an internal fault and stops ice production entirely.

  2. 02

    Seized or failed harvest motor

    Part replacement

    The harvest motor drives the ice ejection mechanism. If the motor seizes or its windings fail, the internal electronics detect a stall or overcurrent condition and trigger the 4-1-1 code.

  3. 03

    Failed internal ice maker thermistor

    Part replacement

    The ice maker uses an internal thermistor to monitor tray temperature during freeze and harvest cycles. If this sensor fails or reads out of range, the module logs an internal fault.

  4. 04

    Transient voltage or power disruption

    Wiring / connection

    A brief power fluctuation or surge can cause the ice maker module to enter a fault state. This is the least serious cause and can often be resolved by a full power cycle of the appliance.

See the test procedure for each cause

Frequently asked questions about 4-1-1

What does 4-1-1 mean on a Bosch refrigerator?
The 4-1-1 code on a Bosch refrigerator indicates an internal ice maker fault. This means the ice maker assembly has detected a failure within its own internal components or circuitry. The code is specific to the ice maker module and does not indicate a problem with the main refrigerator control board, water line, or freezer temperature. Ice production will stop while this fault is active.
Can I fix the 4-1-1 error myself, or do I need a technician?
The first step you can try yourself is a full power cycle: turn the refrigerator off at the control panel or unplug it, wait a minute, then restore power. If the 4-1-1 code clears and does not return, no further action is needed. If the code comes back, the ice maker assembly needs to be replaced, which is a repair most experienced DIYers can handle but may be better left to a technician if you are unfamiliar with refrigerator disassembly.
Will resetting the refrigerator clear the 4-1-1 error code?
A power cycle reset may clear the 4-1-1 code if the fault was caused by a temporary voltage irregularity or signal glitch. To reset, turn the appliance off and back on. However, if the fault is due to a physical failure inside the ice maker module, such as a failed motor or control board, the code will return after the reset and the ice maker will need to be replaced.
Is a 4-1-1 error on a Bosch refrigerator a safety concern?
No, the 4-1-1 fault is not a safety concern. It is specific to the ice maker module and does not affect the refrigerator or freezer compartment temperatures. Your food will remain safe while this code is active. The only impact is that the ice maker will not produce ice until the fault is resolved.
How much does it cost to fix a 4-1-1 error on a Bosch refrigerator?
If the ice maker assembly needs to be replaced, part costs typically range from around $100 to $300 depending on the specific Bosch model. If you hire a technician, expect to add $100 to $200 or more for labor, bringing the total repair cost to roughly $200 to $500. A power cycle that resolves the error costs nothing.

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