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Error code reference

Bosch Refrigerator Error Code 3-4-6

Ice maker

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What the 3-4-6 error code actually means

Your Bosch refrigerator has detected a problem with the motor that crushes ice into smaller pieces when you select the crushed ice setting. This means crushed ice dispensing may not work, though other refrigerator functions should be unaffected. A technician will need to test the motor and possibly replace either the motor or the ice maker unit.

Diagnostic procedure

The full 3-4-6 procedure

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MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check crusher motor; if problematic replace motor; if OK replace icemaker.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 3-4-6

Ranked by how often they cause this code
  1. 1Failed crusher motor
  2. 2Mechanical jam or binding in the crusher
  3. 3Loose or corroded motor wiring connector
  4. 4Faulty ice maker control board

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Questions people ask about 3-4-6

What does 3-4-6 mean on a Bosch refrigerator?
Error code 3-4-6 indicates a fault with the ice maker's crusher motor. The control system has detected that the crusher motor is not operating correctly, which affects the crushed ice dispensing function. The refrigerator's cooling and other functions typically remain unaffected by this specific fault.
Is it safe to keep using my refrigerator when code 3-4-6 is active?
Yes, error code 3-4-6 is specific to the crusher motor within the ice maker and does not affect the refrigerator's cooling system or food safety. You can continue to use the refrigerator normally, though the crushed ice dispensing function may be unavailable until the fault is repaired.
Will resetting my Bosch refrigerator clear error code 3-4-6?
A reset may temporarily clear the code from the display, but the fault will return if the underlying problem with the crusher motor or ice maker assembly is not resolved. The error code is triggered by an actual electrical or mechanical fault, not a software glitch, so the hardware issue must be diagnosed and repaired to permanently clear the code.
Can I fix error code 3-4-6 myself?
Some basic checks are within reach for a careful DIYer, such as inspecting the crusher mechanism for ice jams and checking the motor's wiring connector for looseness or corrosion. However, testing the motor electrically and replacing the crusher motor or ice maker assembly generally requires some mechanical aptitude and familiarity with appliance disassembly. If you are not comfortable with those steps, a qualified appliance technician is recommended.
How much does it cost to repair a Bosch refrigerator with error code 3-4-6?
Repair costs depend on which component is at fault. A crusher motor replacement tends to be less expensive, generally in the range of $80 to $200 including parts and labor. If the full ice maker assembly requires replacement, costs can range from $200 to $450 or more depending on the specific model and labor rates in your area.

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