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Error code reference

Thermador Refrigerator Error Code 3-1-1

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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  • Wiring diagram references and connector pinouts from the OEM service manual
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What 3-1-1 means on a Thermador refrigerator

Error code 3-1-1 on a Thermador refrigerator indicates an internal ice maker fault. This code is generated when the ice maker's control logic detects an operational failure within the ice maker unit itself. Unlike sensor-specific or temperature-related codes, a 3-1-1 fault points to a problem originating inside the ice maker assembly, which can include its internal control board, motor, thermostat, or ejector mechanism.

The ice maker module in Thermador refrigerators is a self-contained unit that manages the full ice production cycle: water fill timing, freeze duration, harvest motor operation, and ice ejection. When any internal component of this assembly fails in a way that disrupts the cycle or causes the module's logic to detect an unrecoverable condition, the 3-1-1 code is triggered. Common internal failure points include a seized harvest motor, a failed ice maker thermostat, or an internal control board fault that prevents the cycle from completing.

The primary diagnostic approach is a power cycle: switching the refrigerator off and back on can clear transient faults caused by temporary voltage irregularities or software glitches. If the 3-1-1 code returns after the reset, the ice maker unit is considered faulty and should be replaced as an assembly. Individual sub-components within the ice maker module are typically not serviced separately, making full module replacement the standard corrective action.

Source: manufacturer service documentation.

Common causes of 3-1-1

  1. 01

    Internal ice maker control board failure

    Part replacement

    The ice maker's built-in control board can fail due to age, moisture exposure, or electrical surges, causing the module to report an unrecoverable fault. This is the most frequent reason a 3-1-1 code persists after a reset.

  2. 02

    Seized or failed harvest motor

    Part replacement

    The harvest motor drives the ejector arms that push ice out of the mold. If the motor seizes or burns out, the ice maker detects a stalled cycle and triggers the internal fault code.

  3. 03

    Ice maker thermostat failure

    Part replacement

    An internal thermostat monitors mold temperature to determine when ice is ready to harvest. A failed thermostat can cause the module to misread cycle status and generate an internal fault.

  4. 04

    Transient electrical or software glitch

    Wiring / connection

    Brief power fluctuations or a one-time software error in the ice maker module can trigger a 3-1-1 code without any physical component failure. A power cycle will resolve this if no hardware fault is present.

  5. 05

    Ice maker module frozen or mechanically jammed

    Wiring / connection

    Ice buildup around the ejector arms or within the mold can mechanically jam the harvest cycle, causing the module to register an internal fault. Inspect the ice maker area for visible ice accumulation before replacing the unit.

See the test procedure for each cause

Frequently asked questions about 3-1-1

What does 3-1-1 mean on a Thermador refrigerator?
The 3-1-1 code on a Thermador refrigerator indicates an internal ice maker fault. The refrigerator's diagnostic system has detected a failure within the ice maker assembly itself, rather than in an external sensor or connected component. The first step is to turn the appliance off and back on to rule out a transient glitch. If the code returns after the reset, the ice maker unit needs to be replaced.
Will resetting my Thermador refrigerator clear the 3-1-1 error code?
A reset can clear the 3-1-1 code if the fault was caused by a temporary electrical fluctuation or a one-time software error. Turn the refrigerator off, wait a minute, and power it back on. If the code reappears after the reset, the fault is persistent and the ice maker module will need to be replaced, as a reset will not resolve a hardware failure inside the unit.
How do I fix the 3-1-1 error code on my Thermador refrigerator?
Start by switching the refrigerator off and on to see if the code clears. If it does not, the ice maker assembly needs to be replaced as a unit. Before ordering a replacement, check the ice maker area for visible ice jams or mechanical obstructions, as clearing a jam may resolve the issue without part replacement. If no jam is found and the code persists, full module replacement is the correct repair.
Is a 3-1-1 error on my Thermador refrigerator a safety concern?
The 3-1-1 fault is specific to the ice maker and does not affect the refrigerator's cooling system or food safety. Your refrigerator will continue to maintain temperature and preserve food normally while this code is active. The only function impacted is ice production. There is no safety hazard associated with this fault code, so there is no urgency to stop using the refrigerator.
How much does it cost to fix a 3-1-1 error on a Thermador refrigerator?
If the reset does not clear the code and the ice maker module needs replacement, parts costs typically range from $80 to $250 or more depending on the specific model, with labor adding $100 to $300 if a technician is hired. Total repair costs generally fall in the range of $150 to $500 for a professional repair. Costs can vary based on your location and the specific Thermador model involved.

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