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Error code reference

Thermador Refrigerator Error Code 3-3-5

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 3-3-5 means on a Thermador refrigerator

The Thermador error code 3-3-5 indicates an internal ice maker fault. This code points to a failure within the ice maker assembly itself rather than an external factor such as water supply or temperature. The ice maker module contains an integrated control board that monitors and sequences the harvest cycle, water fill, and motor operations. When the internal logic detects an out-of-range condition or a failure in one of these sequenced operations, it triggers the 3-3-5 fault to alert the technician that the assembly has failed at the component level.

Because the fault is classified as internal to the ice maker, the diagnostic process is straightforward but limited in scope. The first step is a power cycle: switching the refrigerator off and then back on allows the ice maker control to reinitialize and clear any transient fault states. If the 3-3-5 code returns after the power cycle, this confirms that the fault is persistent and not caused by a momentary voltage fluctuation or communication glitch. At that point, the ice maker assembly requires replacement as a unit, since the internal fault cannot be resolved by servicing individual subcomponents within the module.

Common root causes include a failed ice maker control board, a seized or failed harvest motor, a stuck thermostat within the module, or a wiring fault internal to the assembly. These failures are generally not field-repairable at the component level, which is why replacement of the full ice maker unit is the recommended resolution once the power cycle test confirms the fault persists.

Source: manufacturer service documentation.

Common causes of 3-3-5

  1. 01

    Failed ice maker control board

    Part replacement

    The internal control board within the ice maker module manages the harvest cycle and fill operations. A failed board cannot sequence these operations correctly and will produce a persistent 3-3-5 fault after a power cycle.

  2. 02

    Seized or failed harvest motor

    Part replacement

    The harvest motor drives the ejector blades to release ice cubes. If the motor has seized or burned out internally, the ice maker module detects the stall condition and logs an internal fault.

  3. 03

    Stuck or failed internal thermostat

    Part replacement

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

  4. 04

    Transient voltage or power glitch

    Wiring / connection

    A brief power interruption or voltage spike can cause the ice maker control to enter a fault state. This is the least serious possibility and is resolved by a power cycle, which should be performed before replacing any parts.

  5. 05

    Internal wiring fault within the ice maker assembly

    Part replacement

    Broken or shorted wires within the ice maker module can cause the internal control to detect an abnormal condition. Since the wiring is integrated into the assembly, the entire unit requires replacement.

See the test procedure for each cause

Frequently asked questions about 3-3-5

What does 3-3-5 mean on a Thermador refrigerator?
The 3-3-5 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 or control logic. The fault is specific to the ice maker unit itself, not to external systems like water supply lines or refrigerator temperature. If a power cycle does not clear the code, the ice maker unit requires replacement.
Will resetting my Thermador refrigerator clear the 3-3-5 error?
A power cycle, turning the refrigerator off and then back on, is the recommended first step and may clear the code if it was caused by a transient glitch. However, if the 3-3-5 code returns after the reset, the fault is persistent and a reset will not resolve it. In that case, the ice maker assembly must be replaced to eliminate the fault.
How do I fix a 3-3-5 error on a Thermador refrigerator?
Start by switching the refrigerator off and on to perform a power cycle and allow the ice maker to reinitialize. If the 3-3-5 code reappears, the ice maker assembly has an internal fault that cannot be repaired at the component level and the full unit must be replaced. A qualified appliance technician can confirm the diagnosis and install the replacement ice maker.
Is a 3-3-5 error on a Thermador refrigerator a safety concern?
The 3-3-5 fault is specific to the ice maker and does not affect the main refrigeration or freezing functions of the appliance. The refrigerator will continue to cool normally. The fault does not present a safety hazard, but it does mean the ice maker will not produce ice until the issue is resolved.
How much does it cost to fix a Thermador refrigerator with a 3-3-5 error?
Repair costs vary depending on the specific model and local labor rates. The ice maker assembly itself typically ranges from around 100 to 300 dollars for parts, and professional installation labor can add another 100 to 200 dollars depending on your area. Getting a quote from a certified technician before proceeding is advisable to confirm the part cost for your specific model.

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