Bosch Refrigerator Error Code 3-4-3

Error code 3-4-3 on a Bosch refrigerator indicates an internal ice maker fault. The refrigerator's control board has detected a problem originating inside the ice maker assembly itself. This is distinct from water supply or temperature-related ice maker issues, which produce different codes. The fault points to a failure of one or more components within the ice maker unit, such as the harvest motor, internal thermostat, or onboard control electronics.

A power cycle reset will clear the 3-4-3 error if the fault was caused by a temporary electrical glitch. Switch the appliance off at the power outlet or circuit breaker, wait at least one minute, and switch it back on. If the code reappears after the reset, the underlying fault is a physical failure inside the ice maker unit and resetting alone will not resolve it.

If the fault requires replacing the ice maker assembly, parts typically range from roughly $80 to $200 depending on the specific Bosch model. Professional labor to diagnose and install the replacement unit can add another $100 to $250. A DIY replacement eliminates the labor cost entirely, making it a relatively affordable repair if you are comfortable working with appliance components.

The first step you can try yourself is a power cycle: turn the refrigerator off, wait a minute, then turn it back on. If the 3-4-3 code clears and does not return, no further action is needed. If the code comes back, the ice maker assembly requires replacement, which is a repair that many experienced DIYers can perform by disconnecting the old unit and installing a compatible replacement module.

The 3-4-3 fault is specific to the ice maker and does not affect the refrigerator or freezer cooling functions. Your food storage compartments should continue to operate normally while this code is active. You can safely continue using the refrigerator for food storage, but the ice maker will not produce ice until the fault is resolved.