Bosch Refrigerator Error Code 3-4-2

Error code 3-4-2 on a Bosch refrigerator indicates an internal ice maker fault. The refrigerator's control system has detected a failure originating inside the ice maker assembly itself. This is distinct from external supply issues and points to a hardware problem within the ice maker module. If a power cycle does not clear the code, the ice maker unit requires replacement.

The power cycle step can be performed by any homeowner without tools or technical knowledge. However, if the fault persists, the repair requires replacing the ice maker assembly, which involves disconnecting the unit from the water supply line and electrical harness. This is a moderate difficulty repair suitable for experienced DIYers, though hiring a qualified appliance technician is recommended if you are not comfortable working with refrigerator internals.

If a replacement ice maker assembly is needed, parts typically range from around $80 to $250 or more depending on the specific Bosch model. If you hire a technician, labor costs will add to that total, making the full repair cost generally fall somewhere between $150 and $400. Getting a quote from a certified Bosch service provider before committing to the repair is advisable, especially on older units.

A power cycle is the recommended first diagnostic step for this fault. Switch the refrigerator off, wait at least one minute, and turn it back on. If the 3-4-2 code does not return, the fault was likely a temporary control error. If the code reappears after the reset, the ice maker has a confirmed internal hardware failure and must be replaced.

The 3-4-2 fault is specific to the ice maker and does not affect the refrigerator or freezer compartments' ability to maintain temperature. Your food will remain safe, and the refrigerator can continue to be used normally. The ice maker will not produce ice while this fault is active, so you will need an alternative ice source until the repair is completed.