Thermador Refrigerator Error Code 3-4-3

Error code 3-4-3 indicates an internal ice maker fault on a Thermador refrigerator. The code means the refrigerator's control system has detected a failure originating inside the ice maker module itself. This is distinct from external issues like water supply problems or freezer temperature faults. If a power cycle does not clear the code, the ice maker assembly requires replacement.

Start by switching the refrigerator off completely and then back on. If the 3-4-3 code does not return, the issue was a transient fault and no further action is needed. If the code comes back, the ice maker assembly must be replaced, as the fault is internal to the module and is not serviceable through adjustments or cleaning alone.

Because the 3-4-3 error requires replacing the ice maker assembly in most cases, repair costs will include both the part and labor. Ice maker assemblies for Thermador refrigerators typically range from $150 to $400 depending on the specific model. Professional labor to diagnose and install the component generally adds $100 to $250, bringing total repair costs to a range of roughly $250 to $650.

A power cycle, turning the appliance off and back on, is the correct first step for a 3-4-3 error. If the fault was caused by a temporary electronic glitch, the reset will clear it and normal ice production will resume. However, if the internal fault is mechanical or electronic in nature, the code will reappear and a reset alone will not resolve the problem.

An active 3-4-3 fault means the ice maker is not functioning properly, but it does not typically affect the refrigerator's cooling or food preservation functions. The refrigerator and freezer compartments should continue to operate normally. You can safely continue using the appliance for food storage while scheduling a repair, but ice production will be unreliable or completely stopped until the ice maker is replaced.