Thermador Refrigerator Error Code 3-4-2

Error code 3-4-2 indicates an internal ice maker fault, meaning the ice maker assembly has detected a problem within its own circuitry or mechanical components. The fault originates inside the ice maker module rather than in external wiring or the refrigerator's main control system. Thermador's diagnostic procedure calls for a power cycle first, and if the code returns, the ice maker unit should be replaced.

The power cycle step is something most homeowners can perform safely by unplugging the refrigerator for about a minute. If the code persists, replacing the ice maker assembly is a more involved repair that requires accessing the ice maker compartment, disconnecting electrical connectors, and installing a new unit. Technicians comfortable with appliance disassembly can often complete this replacement, but others may prefer to have a professional handle it.

If the issue requires replacing the ice maker assembly, parts costs typically range from around 150 to 400 dollars depending on the specific Thermador model. Professional labor to diagnose and install the replacement can add another 100 to 250 dollars, bringing the total repair cost to roughly 250 to 650 dollars in most cases. Getting a price quote for your specific model number before proceeding is recommended.

A power cycle, turning the refrigerator fully off and back on, is the recommended first step and can clear the code if the fault was a transient control error. However, if the 3-4-2 code reappears after the reset, the ice maker module has a confirmed internal fault and resetting alone will not resolve it. In that case, replacement of the ice maker assembly is required.

A 3-4-2 fault code affects only the ice maker and does not indicate a problem with the refrigerator's cooling system or food safety. Your refrigerator and freezer compartments should continue to operate normally. The ice maker will not produce ice while the fault is active, but the appliance itself is safe to continue using.