Thermador Refrigerator Error Code 5-5-1

Error code 5-5-1 on a Thermador refrigerator indicates an internal ice maker fault. The refrigerator has detected a failure within the ice maker system that it cannot resolve automatically. Diagnosis begins with a power cycle, followed by inspection of the water inlet heater at the back of the appliance, and potentially replacing the ice maker assembly if the heater tests as functional.

Start by switching the refrigerator off, waiting a few minutes, and turning it back on. If the error reappears, inspect the water inlet heater located at the back of the appliance using a multimeter to check for continuity. If the heater is functioning correctly, the ice maker assembly itself will need to be replaced. This repair involves working with the water supply and electrical components, so technicians or experienced DIYers should handle it.

Repair costs depend on which component has failed. Replacing a water inlet heater is generally a lower-cost repair, while replacing the full ice maker assembly will cost more due to the price of the part itself. Including labor from a qualified technician, total repair costs for this type of fault typically range from around $150 to $500 or more depending on parts pricing and local labor rates.

A power cycle, turning the appliance off and back on, is the recommended first step and may clear the code if the fault was caused by a temporary glitch. However, if a hardware component such as the water inlet heater or the ice maker module has actually failed, the code will return after the reset. A recurring 5-5-1 code requires hands-on component diagnosis.

The 5-5-1 fault is specific to the ice maker system and does not directly affect the refrigerator or freezer compartment temperatures. The appliance should continue to cool and preserve food safely while this code is active. However, the ice maker will not function normally until the fault is resolved, and leaving a failed component unaddressed for an extended period is not recommended.