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Error code reference

Bosch Refrigerator Error Code 3-4-9

Ice maker

Bosch codesBosch refrigerator codes

Ice maker: Crusher solenoid faulty.

First step from the service manual

Check solenoid; if problematic replace; if OK replace icemaker.

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

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What 3-4-9 means on a Bosch refrigerator

Error code 3-4-9 on a Bosch refrigerator indicates a fault with the ice maker's crusher solenoid. The crusher solenoid is an electromechanical component responsible for actuating the ice crushing mechanism, which switches the ice maker between cubed and crushed ice output modes. When the refrigerator's control board sends a signal to activate the solenoid and does not receive the expected response, or detects an out-of-range electrical condition, it logs this fault code and may disable the ice making or dispensing function.

The most common causes of this fault are a failed solenoid coil, a wiring harness problem between the control board and the solenoid, or a mechanical jam that places excessive load on the solenoid. A faulty solenoid coil will typically show either an open circuit or a short when tested with a multimeter, deviating from its rated resistance specification. Wiring issues such as corroded terminals, pinched wires, or a broken connector can also produce the same fault by interrupting the control signal or return path.

Diagnosis follows a clear sequence: inspect and test the crusher solenoid first. If the solenoid tests faulty, replace it. If the solenoid checks out within spec, the fault likely originates inside the ice maker assembly itself, and replacing the entire ice maker unit is the recommended next step. Skipping straight to ice maker replacement without confirming the solenoid condition first is likely to result in unnecessary parts cost.

Source: manufacturer service documentation.

Common causes of 3-4-9

  1. 01

    Failed crusher solenoid coil

    Part replacement

    The solenoid coil can burn out or develop an open circuit over time, preventing it from actuating. Testing with a multimeter will reveal no continuity or a resistance reading outside the expected range.

  2. 02

    Wiring harness or connector fault

    Wiring / connection

    Corroded terminals, a broken wire, or a damaged connector between the control board and the solenoid can interrupt the electrical signal. Visually inspect the harness and check for continuity through each wire.

  3. 03

    Mechanical jam in the crushing mechanism

    Wiring / connection

    Ice buildup or a foreign object can jam the crusher, placing excessive load on the solenoid and causing it to overheat or fail. Inspect the crusher mechanism for obstructions after clearing ice from the dispenser area.

  4. 04

    Faulty ice maker assembly

    Part replacement

    If the solenoid and wiring both test within spec, the fault may originate from a defect inside the ice maker assembly itself. In this case, replacing the entire ice maker unit is the recommended repair.

See the test procedure for each cause

Frequently asked questions about 3-4-9

What does 3-4-9 mean on a Bosch refrigerator?
Error code 3-4-9 indicates a fault with the ice maker's crusher solenoid. The crusher solenoid controls the mechanism that switches between cubed and crushed ice. The refrigerator's control board has detected an abnormal electrical condition from this component. Ice dispensing may be impaired until the issue is resolved.
How do I fix error code 3-4-9 on a Bosch refrigerator?
Start by testing the crusher solenoid with a multimeter to check for an open circuit, short, or abnormal resistance. If the solenoid is faulty, replace it. If the solenoid tests within normal parameters, the next step is to replace the ice maker assembly. Also inspect the wiring harness and connectors between the solenoid and the control board for damage or corrosion.
Will resetting my Bosch refrigerator clear error code 3-4-9?
A reset may temporarily clear the code from the display, but if the underlying fault with the crusher solenoid or ice maker is not repaired, the code will return. Resetting without addressing the root cause is not a fix. The solenoid or wiring must be inspected and repaired or replaced to resolve the error permanently.
Is error code 3-4-9 on a Bosch refrigerator a safety concern?
This fault code relates specifically to the ice maker's crusher solenoid and does not indicate a risk to food safety or a fire hazard under normal circumstances. The refrigerator's cooling functions should remain unaffected. However, the ice dispenser may not operate correctly until the fault is addressed, so prompt repair is recommended.
How much does it cost to repair error code 3-4-9 on a Bosch refrigerator?
Repair costs depend on whether only the crusher solenoid needs replacement or the entire ice maker assembly is required. Solenoid replacement is generally the lower-cost option, while a full ice maker assembly replacement will be more expensive. Combined parts and labor costs typically range from around $150 to $400 or more depending on your location and the specific parts needed.

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