Thermador Refrigerator Error Code 3-4-4

Error code 3-4-4 on a Thermador refrigerator indicates an internal ice maker fault. This means the refrigerator's control system has detected a failure condition within the ice maker assembly itself. The refrigerator's cooling and food preservation functions are not affected, but ice production will stop until the fault is resolved.

Start by switching the refrigerator off and then back on to allow the control system to reset. If the 3-4-4 code does not return, monitor the ice maker for normal operation. If the code comes back, the ice maker assembly will need to be replaced, as the fault is internal to the module and not serviceable at the component level.

Because the 3-4-4 fault typically requires replacing the ice maker assembly, costs will depend on the specific ice maker part needed for your model and local labor rates. Parts alone for a replacement ice maker assembly generally range from $150 to $400 or more depending on the model, with additional costs for professional installation. Getting a quote from a qualified appliance technician before proceeding is recommended.

Turning the refrigerator off and back on is the recommended first diagnostic step for a 3-4-4 fault. If the code was caused by a transient power glitch or a temporary communication error, a power cycle may clear it permanently. However, if the code reappears after the reset, the ice maker has an actual internal failure and will need to be replaced.

A 3-4-4 fault is not a safety hazard. The fault is isolated to the ice maker assembly and does not affect the refrigerator's compressor, cooling system, or food storage temperatures. You can continue using the refrigerator normally while you arrange for ice maker repair or replacement.