mypros+
Error code reference

Thermador Refrigerator Error Code 2-3-1

Icemaker

Thermador codesThermador refrigerator codes

Icemaker: Internal ice maker fault.

First step from the service manual

Replace the icemaker.

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

MyPros+ Max

Get the full diagnostic procedure for 2-3-1.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 2-3-1 means on a Thermador refrigerator

The Thermador error code 2-3-1 indicates an internal ice maker fault, meaning the ice maker module itself has detected a failure condition it cannot resolve through normal operation. This fault originates from within the ice maker assembly rather than from an external sensor or wiring issue. The ice maker's onboard control logic monitors critical functions such as the harvest cycle timing, thermostat continuity, and motor operation. When any of these internal processes fall outside acceptable parameters, the module flags an internal fault and communicates it to the main control board as error code 2-3-1.

Because this fault is classified as internal to the ice maker unit, the diagnostic approach focuses on the ice maker assembly as the primary suspect rather than external components like the water inlet valve or freezer temperature sensor. The fault can stem from a failed harvest motor, a defective thermostat embedded in the module, corrupted control logic on the ice maker's circuit board, or mechanical binding within the ejector mechanism. Since these internal components are not individually serviceable in most cases, the recommended first diagnostic step is direct replacement of the entire ice maker assembly. Before replacement, technicians should verify that freezer temperature is within the correct operating range and that the ice maker is receiving proper voltage, ruling out external conditions that could mimic an internal fault.

Source: manufacturer service documentation.

Common causes of 2-3-1

  1. 01

    Failed ice maker assembly

    Part replacement

    The internal control board, harvest motor, or thermostat within the ice maker module has failed. Since these components are not individually replaceable in most configurations, the entire ice maker assembly requires replacement.

  2. 02

    Defective harvest motor

    Part replacement

    The motor responsible for rotating the ejector blades during the harvest cycle may have seized or burned out, causing the ice maker's internal logic to register a fault. The motor is housed within the ice maker module.

  3. 03

    Failed internal ice maker thermostat

    Part replacement

    The ice maker contains an internal thermostat that signals when the ice tray has reached the correct temperature to begin a harvest cycle. If this thermostat fails open or short, the module cannot complete its cycle and triggers an internal fault.

  4. 04

    Mechanical binding in the ejector mechanism

    Wiring / connection

    Ice chunks or foreign debris lodged in the ejector arm or tray can cause the harvest motor to stall, which the control logic interprets as an internal fault. Inspect the ice maker tray for obstructions before replacing the unit.

  5. 05

    Incorrect freezer temperature

    Wiring / connection

    If the freezer compartment is not maintaining the correct temperature, the ice maker's internal cycle logic may fail to complete properly, triggering a fault code. Confirm the freezer is operating within its specified temperature range before replacing the ice maker.

See the test procedure for each cause

Frequently asked questions about 2-3-1

What does 2-3-1 mean on a Thermador refrigerator?
Error code 2-3-1 on a Thermador refrigerator indicates an internal ice maker fault. This means the ice maker module has detected a failure within its own internal components or control logic. Ice production will not occur while this fault is active. The primary recommended repair is replacement of the ice maker assembly.
Can I fix error code 2-3-1 myself?
A homeowner or experienced DIYer can begin by checking for ice or debris lodged in the ejector mechanism and confirming the freezer is at the correct temperature. If those checks do not resolve the fault, replacing the ice maker assembly is the next step. Ice maker replacement is a moderate-difficulty repair that involves disconnecting wiring harnesses and removing mounting hardware. If you are not comfortable working inside a refrigerator, a technician is recommended.
Is error code 2-3-1 on a Thermador refrigerator a safety concern?
Error code 2-3-1 is not a safety hazard. It is limited to the ice maker system and does not affect the refrigerator's ability to cool food or the freezer's normal operation. You can continue using the refrigerator while scheduling the repair, though ice production will be inactive.
How much does it cost to fix a 2-3-1 error on a Thermador refrigerator?
If the ice maker assembly requires replacement, the part itself typically costs in the range of $150 to $400 depending on the specific Thermador model. If a technician is hired for the repair, labor charges generally add $100 to $250 to the total cost. Prices can vary based on your region and service provider.
Will resetting the refrigerator clear the 2-3-1 error code?
A power reset may temporarily clear the fault code display, but it will not resolve the underlying internal ice maker fault. If the ice maker module has a failed component, the error code will return once the refrigerator restores power and the ice maker attempts to run its cycle. A reset is only useful to confirm whether the fault is intermittent or persistent.

Related Thermador refrigerator codes

All Thermador refrigerator codes
View all 49 Thermador refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass