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Error code reference

Thermador Refrigerator Error Code 4-1-1

Icemaker

Thermador codesThermador refrigerator codes

Icemaker: Internal ice maker fault.

First step from the service manual

Switch the appliance off and on; if fault code reappears, replace the ice maker.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 4-1-1 means on a Thermador refrigerator

Error code 4-1-1 on a Thermador refrigerator indicates an internal ice maker fault. This code points specifically to a failure within the ice maker assembly itself rather than an external component such as the water inlet valve or the freezer temperature. The ice maker module contains several integrated components including the motor, thermostat, heater, and control circuitry, and a fault in any of these internal elements can trigger this code.

The internal fault designation means the ice maker's own control board or mechanical cycle has encountered a condition it cannot recover from through normal operation. Common triggers include a seized harvest motor, a failed internal thermostat that prevents the harvest cycle from completing, or a defective control module within the ice maker unit. Because these components are integrated into the assembly, individual component-level repair is generally not feasible.

Thermador's diagnostic procedure begins with a power cycle, switching the refrigerator off and back on to determine whether the fault was caused by a temporary electrical glitch or communication error. If the 4-1-1 code returns after the reset, the ice maker assembly is considered faulty and requires full replacement. Attempting to operate the refrigerator with a persistent 4-1-1 fault will result in no ice production, but it will not affect refrigeration or freezer performance in the rest of the unit.

Source: manufacturer service documentation.

Common causes of 4-1-1

  1. 01

    Failed ice maker control module

    Part replacement

    The internal control board within the ice maker assembly can fail due to power surges or component wear, causing the unit to report a fault it cannot self-recover from. If the error returns immediately after a power cycle, a failed module is the most likely culprit.

  2. 02

    Seized or failed harvest motor

    Part replacement

    The harvest motor drives the ejector blades that push ice out of the mold. If the motor seizes or burns out, the ice maker halts mid-cycle and triggers an internal fault code.

  3. 03

    Defective internal ice maker thermostat

    Part replacement

    The ice maker contains a thermostat that monitors mold temperature and initiates the harvest cycle. A failed thermostat can prevent the cycle from completing, causing the module to register a fault.

  4. 04

    Temporary electrical or communication glitch

    Wiring / connection

    A brief power fluctuation or communication error between the refrigerator control board and the ice maker can produce a false 4-1-1 fault. This is ruled out by performing the power cycle reset described in the diagnostic procedure.

See the test procedure for each cause

Frequently asked questions about 4-1-1

What does 4-1-1 mean on a Thermador refrigerator?
The 4-1-1 error code on a Thermador refrigerator indicates an internal ice maker fault. This means the ice maker assembly has detected a failure within its own components, such as the harvest motor, internal thermostat, or control module. The rest of the refrigerator's cooling system is not affected by this fault. Ice production will stop until the issue is resolved.
Will resetting the refrigerator clear the 4-1-1 error code?
A power cycle reset is always the first step and can clear the code if the fault was caused by a temporary electrical glitch. To reset, switch the refrigerator off, wait a minute, and turn it back on. If the 4-1-1 code reappears after the reset, the fault is considered persistent and the ice maker assembly will need to be replaced.
How do I fix a 4-1-1 error on a Thermador refrigerator?
Start by turning the refrigerator off and back on to perform a power cycle reset. If the error code returns, the ice maker assembly requires replacement, as the fault is internal to the unit and not serviceable at the component level. Replacing the ice maker assembly is the repair procedure specified for a persistent 4-1-1 fault.
Is it safe to keep using my Thermador refrigerator with a 4-1-1 error?
Yes, a 4-1-1 fault affects only the ice maker and does not impact the refrigerator or freezer compartments. Your food will remain safely cooled while this error is present. However, the ice maker will not produce ice until it is repaired or replaced.
How much does it cost to fix a Thermador refrigerator 4-1-1 error?
If a power cycle clears the error, there is no parts cost involved. If the ice maker assembly needs replacement, parts alone typically range from $150 to $400 or more depending on the specific Thermador model, and professional labor can add $100 to $250 to that total. Getting a quote from an authorized service technician before proceeding is recommended.

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