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Error code reference

Thermador Refrigerator Error Code 3-2-3

Icemaker

Thermador codesThermador refrigerator codes

Icemaker: Water valve of icemaker faulty.

First step from the service manual

Check water fill valve of icemaker; if problematic replace water valve, if valve is OK replace icemaker.

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

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What 3-2-3 means on a Thermador refrigerator

Error code 3-2-3 on a Thermador refrigerator points to a fault in the icemaker's water fill valve. This solenoid-operated valve controls the flow of water into the icemaker during the fill cycle. When the control board detects that the valve is not performing as expected, either due to an electrical fault, a mechanical failure, or an out-of-range signal, it logs this code and may suspend icemaker operation to prevent flooding or a dry-run condition.

The water fill valve is an electromechanical component that receives a timed signal from the icemaker module to open and allow a measured amount of water into the ice mold. Common failure modes include a burned-out solenoid coil, a stuck or debris-fouled valve seat, or a wiring harness issue between the control board and the valve. If the valve solenoid coil has failed, it will typically show an open circuit or incorrect resistance when tested with a multimeter. If electrical continuity and resistance values check out correctly, the fault may instead reside within the icemaker module itself, and replacing the icemaker assembly would be the next step.

Source: manufacturer service documentation.

Common causes of 3-2-3

  1. 01

    Failed water fill valve solenoid

    Part replacement

    The solenoid coil inside the water fill valve can burn out or develop an open circuit, preventing the valve from opening. Testing the solenoid with a multimeter for continuity and proper resistance will confirm this failure.

  2. 02

    Stuck or clogged valve seat

    Part replacement

    Mineral deposits or debris can prevent the valve seat from opening or closing properly, disrupting the fill cycle. This can sometimes be identified by the valve failing to pass water even when electrically energized.

  3. 03

    Wiring harness fault

    Wiring / connection

    A damaged, corroded, or disconnected wire between the control board and the water fill valve can mimic a valve failure. Inspecting the connector and wiring for visible damage or measuring voltage at the valve during a fill cycle can isolate this cause.

  4. 04

    Faulty icemaker module

    Part replacement

    If the water fill valve tests as electrically sound, the icemaker module itself may be sending incorrect signals or failing to trigger the valve. Replacing the icemaker assembly is the recommended next step in that scenario.

See the test procedure for each cause

Frequently asked questions about 3-2-3

What does 3-2-3 mean on a Thermador refrigerator?
Error code 3-2-3 on a Thermador refrigerator indicates a fault with the icemaker's water fill valve. The refrigerator's control system has detected that the valve is not operating correctly, which disrupts the icemaker's ability to receive water. This code directs a technician to inspect the water fill valve first, and if the valve is functioning properly, to replace the icemaker assembly.
Can I fix error code 3-2-3 myself?
A knowledgeable DIYer can start by checking the wiring connections at the water fill valve and testing the solenoid coil for continuity using a multimeter. If the solenoid is open or the valve does not respond to voltage, replacing the water fill valve is a straightforward repair. However, if the valve tests correctly and the icemaker module is at fault, replacing the icemaker assembly requires more comfort with appliance disassembly, so professional service may be preferable.
Will resetting the refrigerator clear error code 3-2-3?
A reset may temporarily clear the code from the display, but it will return if the underlying issue with the water fill valve or icemaker module is not resolved. Resetting without repairing does not fix the root cause and can delay proper diagnosis. It is best to address the fault before relying on the icemaker again.
Is error code 3-2-3 a safety concern?
Error 3-2-3 is not typically a safety hazard in the traditional sense, but a stuck-open water fill valve could potentially cause water to overflow into the icemaker compartment or nearby areas. Addressing the fault promptly helps prevent water damage inside or around the refrigerator. The refrigerator's cooling and food preservation functions are generally not affected by this code.
How much does it cost to repair error code 3-2-3 on a Thermador refrigerator?
Repair costs depend on whether the water fill valve, the icemaker assembly, or just a wiring component needs replacement. A water fill valve replacement typically ranges from around $80 to $200 including parts and labor, while replacing the full icemaker assembly can run from roughly $200 to $450 or more depending on the model and service rates in your area. Getting a diagnosis from a qualified technician first will help you understand exactly what parts are needed.

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