Bosch Refrigerator Error Code 4-3-1

Error code 4-3-1 indicates an internal ice maker fault on a Bosch refrigerator. The code is generated by the ice maker's own self-diagnostic system when it detects an abnormal condition within the unit. It is a general internal fault code rather than one tied to a specific external component like the water supply. If a power cycle does not clear it, the ice maker module itself needs to be replaced.

A power cycle reset is the recommended first diagnostic step and will clear the code if the fault was caused by a transient electronic glitch. However, if the underlying hardware inside the ice maker has failed, the code will return after the reset. A recurring 4-3-1 code after a reset confirms a hardware failure that requires parts replacement.

If a power cycle does not resolve the fault, the repair typically involves replacing the ice maker module. Parts costs for a Bosch ice maker assembly generally range from around $80 to $250 depending on the specific model. Adding professional labor, the total repair cost typically falls in the range of $150 to $400. Costs can vary based on your location and the technician's rates.

The first step you can do yourself is to switch the refrigerator off, wait a few minutes, and turn it back on to see if the error clears. If the code returns, the ice maker module will need to be replaced. Replacing the ice maker assembly is a moderately involved repair that requires disconnecting electrical connections and the water supply line to the unit, which some experienced DIYers can handle.

Error code 4-3-1 relates only to the ice maker and does not affect the refrigerator's core cooling functions. Your food and refrigerator compartment temperatures will remain unaffected. The fault is limited to ice production, so there is no immediate safety risk, but the ice maker will not function normally until the fault is resolved.