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Error code reference

Thermador Refrigerator Error Code 3-1-2

Icemaker

Thermador codesThermador refrigerator codes

Icemaker: Icemaker motor faulty.

First step from the service manual

Switch the appliance off and on; if fault code reappears, replace the ice maker (motor not replaceable).

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 3-1-2 means on a Thermador refrigerator

Error code 3-1-2 on a Thermador refrigerator indicates a fault detected in the icemaker motor. The control system monitors the icemaker's drive motor during its harvest cycle. When the motor fails to respond correctly, draws incorrect current, or does not complete its rotation cycle within the expected parameters, the control board logs this fault code and halts icemaker operation to prevent further damage to the unit.

The icemaker motor is responsible for driving the ejector blades that push finished ice cubes out of the mold and into the ice bin. If this motor seizes, loses continuity, or develops an internal winding failure, the harvest cycle cannot complete. Because the motor is integrated directly into the icemaker assembly on this platform, it is not a separately serviceable component. Thermador designates the entire icemaker module as the field-replaceable unit for this fault.

Diagnosis begins with a power cycle: switch the refrigerator off, wait a brief interval, then power it back on. If the 3-1-2 code clears and icemaker function resumes normally, the fault may have been a transient motor stall or a brief communication error. If the code returns after the power cycle, the icemaker assembly must be replaced. Attempting to open or repair the motor internally is not supported and will not resolve the root cause of the fault.

Source: manufacturer service documentation.

Common causes of 3-1-2

  1. 01

    Failed icemaker motor winding

    Part replacement

    The internal motor windings can burn out or develop an open circuit over time, preventing the motor from rotating during the harvest cycle. This is the most common root cause when the 3-1-2 code persists after a power cycle.

  2. 02

    Seized or mechanically jammed motor

    Wiring / connection

    Ice buildup, a foreign object in the mold area, or a worn gear mechanism can cause the motor to seize, triggering the fault. Inspect the icemaker tray and ejector area for obstructions before replacing the assembly.

  3. 03

    Transient motor stall

    Wiring / connection

    A temporary overload or brief power fluctuation can cause the motor to stall mid-cycle and trigger the fault code without any permanent damage. A successful power cycle that clears the code and restores function confirms this as the cause.

  4. 04

    Wiring harness fault at the icemaker connector

    Wiring / connection

    A loose, corroded, or damaged connector between the icemaker assembly and the control board can interrupt the motor circuit and produce this code. Inspect the harness connection at the icemaker before condemning the unit.

  5. 05

    Control board misread or communication error

    Wiring / connection

    In rare cases, the main control board may incorrectly log a motor fault due to a software or communication glitch. A power cycle is the first step to rule this out before proceeding with parts replacement.

See the test procedure for each cause

Frequently asked questions about 3-1-2

What does 3-1-2 mean on a Thermador refrigerator?
Error code 3-1-2 on a Thermador refrigerator indicates that the icemaker motor has been detected as faulty. The control system monitors the icemaker drive motor during each harvest cycle and logs this code when the motor fails to operate correctly. The icemaker will stop producing ice when this fault is active. If a power cycle does not resolve it, the icemaker assembly requires replacement.
Will resetting my Thermador refrigerator clear the 3-1-2 error code?
A power cycle, turning the appliance off and then back on, is the recommended first step for error code 3-1-2. If the fault was caused by a transient motor stall or brief electrical glitch, the code may clear and normal icemaker function may resume. However, if the motor has a permanent internal failure, the code will return after the reset and the icemaker unit will need to be replaced.
Can I fix the 3-1-2 icemaker motor fault myself?
The icemaker motor on the affected Thermador units is not a separately replaceable component, meaning the entire icemaker assembly must be replaced to resolve this fault. A knowledgeable DIYer comfortable with appliance repair can perform this replacement by disconnecting the unit from power, removing the icemaker module, and installing a compatible replacement assembly. Before replacing parts, verify the wiring harness connector at the icemaker is secure and free of corrosion.
Is it safe to continue using my refrigerator while the 3-1-2 code is active?
The 3-1-2 fault is isolated to the icemaker motor circuit and does not affect the refrigerator or freezer cooling functions. Your food will remain safely refrigerated while this code is present. The only impact is that the icemaker will not produce ice until the fault is resolved.
How much does it cost to fix a Thermador refrigerator showing the 3-1-2 error code?
Repair costs for the 3-1-2 fault vary depending on whether the fix requires only a power cycle or a full icemaker assembly replacement. If a replacement icemaker module is needed, parts typically range from around 100 dollars to over 300 dollars depending on the specific model, with additional labor costs if a technician performs the repair. Getting a quote from a certified Thermador service provider before proceeding is advisable.

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