Bosch Refrigerator Error Code 3-4-5

Error code 3-4-5 on a Bosch refrigerator indicates an internal ice maker fault. The refrigerator's main control system has detected a failure originating inside the ice maker module itself. This is distinct from water supply or temperature-related ice maker problems. If a power cycle does not clear it, the ice maker assembly needs to be replaced.

Start by performing a power cycle: turn the refrigerator off completely and then back on. If the 3-4-5 code persists, check the wiring connector between the refrigerator and the ice maker module for looseness or corrosion. If connections are secure and the fault remains, the ice maker assembly itself needs to be replaced, as the fault is internal to the module.

If the fault clears with a power cycle, there is no parts cost involved. If the ice maker module requires replacement, parts alone typically range from $80 to $250 depending on the specific Bosch model, with professional labor adding $100 to $200 on top of that. Getting a diagnosis from a certified technician first is advisable to confirm replacement is needed before purchasing parts.

A reset is actually the first recommended diagnostic step for error code 3-4-5. Switch the refrigerator off, wait a minute, and turn it back on. If the error code does not return, the fault was a temporary logic error. If the code comes back after the reset, the internal ice maker fault is persistent and the module will need to be replaced.

Error code 3-4-5 is specific to the ice maker and does not indicate a fault with the main refrigerator or freezer cooling systems. Your refrigerator should continue to cool and freeze food normally. However, ice production will likely be stopped or unreliable until the ice maker issue is resolved.