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Error code reference

Bosch Refrigerator Error Code 2-3-1

Ice maker

Bosch codesBosch refrigerator codes

Ice maker: Internal ice maker fault.

First step from the service manual

Replace the icemaker.

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 2-3-1 means on a Bosch refrigerator

Error code 2-3-1 on a Bosch refrigerator indicates an internal ice maker fault. This code points to a failure originating within the ice maker assembly itself rather than in an external component such as the water inlet valve or a temperature sensor outside the unit. The internal fault classification means the ice maker's own control circuitry, motor, thermostat, or mechanical components have failed in a way that the refrigerator's main control board can detect but cannot recover from through a simple reset or external correction.

Because the fault is classified as internal to the ice maker module, Bosch's diagnostic guidance directs technicians to replace the ice maker assembly as the primary corrective action. Attempting to isolate individual sub-components within a sealed or integrated ice maker module is generally not practical, as the internal wiring harness, harvest motor, mold thermostat, and control logic are packaged together. The refrigerator's main board communicates with the ice maker over a dedicated circuit, and when the response from the ice maker falls outside expected parameters, this fault code is triggered and stored.

Source: manufacturer service documentation.

Common causes of 2-3-1

  1. 01

    Failed ice maker assembly

    Part replacement

    The ice maker's internal control board, harvest motor, or mold thermostat has failed. Since these components are integrated into the module, the entire assembly typically needs replacement.

  2. 02

    Faulty ice maker wiring harness or connector

    Wiring / connection

    A damaged, corroded, or loose connector between the refrigerator and the ice maker can cause communication failures that trigger an internal fault code. Inspect the harness and connector pins before replacing the assembly.

  3. 03

    Ice maker thermostat failure

    Part replacement

    The internal mold thermostat regulates the harvest cycle. If it fails, the ice maker cannot complete its cycle correctly and the control system logs an internal fault.

  4. 04

    Ice maker harvest motor failure

    Part replacement

    The harvest motor drives the ejector arms that release ice from the mold. A seized or burned-out motor will cause the ice maker to stall mid-cycle and generate an internal fault.

  5. 05

    Ice buildup or mechanical obstruction

    Wiring / connection

    Excessive ice accumulation around the ice maker can physically block the ejector mechanism, causing repeated faults. Check for frost buildup and defrost the compartment before replacing parts.

See the test procedure for each cause

Frequently asked questions about 2-3-1

What does 2-3-1 mean on a Bosch refrigerator?
Error code 2-3-1 on a Bosch refrigerator indicates an internal ice maker fault. This means the refrigerator's control system has detected a failure originating inside the ice maker assembly itself. The fault can involve the ice maker's motor, thermostat, or internal circuitry. Bosch's diagnostic guidance calls for replacing the ice maker as the primary repair step.
Can I fix the 2-3-1 error on my Bosch refrigerator myself?
A knowledgeable DIYer can address this error by first checking the ice maker wiring harness and connector for damage or loose connections. If the connections are intact, the repair requires replacing the ice maker assembly, which involves disconnecting the unit from its harness and mounting bracket. If you are not comfortable working with refrigerator components, a licensed appliance technician should perform the replacement.
Is error code 2-3-1 on a Bosch refrigerator a safety concern?
Error code 2-3-1 is not a safety hazard. The fault is limited to the ice maker system and does not affect the refrigerator's cooling performance or food safety. Your refrigerator will continue to keep food at proper temperatures even while this fault is active. The only functional impact is that ice production will be disrupted or stopped.
How much does it cost to repair a Bosch refrigerator with error code 2-3-1?
Repair costs depend on whether you replace the ice maker yourself or hire a technician. A replacement ice maker assembly for a Bosch refrigerator typically costs between $80 and $250 for the part alone. If you hire a technician, labor charges generally add $100 to $200 depending on your location. Total professional repair costs commonly fall in the range of $180 to $450.
Will resetting my Bosch refrigerator clear the 2-3-1 error code?
A power reset may temporarily clear the error code from the display, but the fault will return if the underlying ice maker problem is not resolved. Because the code indicates an internal hardware failure within the ice maker module, resetting alone will not fix the root cause. A permanent resolution requires inspecting the wiring connections and, in most cases, replacing the ice maker assembly.

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