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Error code reference

Sub-Zero Refrigerator Error Code 35 1 38

Refrigerator evaporator fan power output fault.

Sub-Zero codesSub-Zero refrigerator codes

Refrigerator evaporator fan power output fault.

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What 35 1 38 means on a Sub-Zero refrigerator

Error code 35 1 38 on a Sub-Zero refrigerator indicates a power output fault on the refrigerator evaporator fan circuit. This means the control board is detecting an abnormal electrical condition when attempting to drive power to the evaporator fan motor located in the refrigerator compartment. The fault can reflect an overcurrent condition, an open circuit, or a short to ground in the fan motor winding or its supply wiring. The evaporator fan is responsible for circulating cold air from the evaporator coil throughout the refrigerator cabinet, so a fault in this circuit will directly impact cooling performance.

The refrigerator evaporator fan is powered through a dedicated output on the main control board. When the board detects that current draw or voltage response on this output falls outside acceptable parameters, it logs the fault and may shut down that output to protect the board from damage. Common triggers include a seized or failing fan motor drawing excessive current, damaged wiring harnesses between the board and fan, or a connector with corrosion or loose pins that creates an intermittent open circuit.

Because this is a power output fault rather than a sensor fault, the problem is most likely mechanical or electrical rather than related to thermistors or sealed system components. Diagnosis should focus on the fan motor itself, the wiring harness running to it, and the output circuit on the control board. A failed fan motor is the most statistically common cause, but a shorted or open harness can produce identical fault codes and should be tested before condemning the motor or the board.

Source: manufacturer service documentation.

Common causes of 35 1 38

  1. 01

    Failed evaporator fan motor

    Part replacement

    A seized or burned-out fan motor can draw excessive current or present an open circuit to the control board, triggering this fault. Inspect the fan blade for physical obstruction and test the motor windings for continuity and correct resistance.

  2. 02

    Damaged or shorted wiring harness

    Part replacement

    The wiring between the control board and the evaporator fan motor can be pinched, chafed, or damaged by ice buildup, causing a short to ground or an open circuit. Visually trace the harness and test each conductor for continuity and insulation integrity.

  3. 03

    Corroded or loose fan motor connector

    Wiring / connection

    Moisture exposure in the evaporator compartment can cause connector pins to corrode or back out, creating intermittent or complete loss of contact. Inspect the connector at the fan motor for corrosion, bent pins, or loose fit.

  4. 04

    Faulty main control board

    Part replacement

    If the fan motor and harness test within normal parameters, the output driver circuit on the control board may have failed, preventing it from properly supplying power to the fan. This is a less common cause but should be considered after ruling out the motor and wiring.

  5. 05

    Ice accumulation blocking fan blade

    Wiring / connection

    Excessive frost buildup around the evaporator fan can lock the blade, causing the motor to stall and draw high current. Defrost the evaporator compartment completely and check for drainage or defrost system issues that allowed ice to accumulate.

See the test procedure for each cause

Frequently asked questions about 35 1 38

What does 35 1 38 mean on a Sub-Zero refrigerator?
Error code 35 1 38 indicates a power output fault on the refrigerator evaporator fan circuit. The control board attempted to drive the evaporator fan motor and detected an abnormal electrical condition, such as an overcurrent draw, a short, or an open circuit. This fault signals a problem with the fan motor itself, the wiring harness, or the board output rather than a sensor or sealed system issue.
Can I fix error code 35 1 38 myself on a Sub-Zero refrigerator?
Some causes, such as a blocked fan blade due to ice or a loose connector, can be addressed without specialized tools. However, testing motor winding resistance, diagnosing wiring harness continuity, and replacing a control board require a good understanding of electrical diagnostics. If you are not comfortable working with appliance wiring and control boards, a qualified technician is recommended.
Is it safe to use my Sub-Zero refrigerator while error code 35 1 38 is active?
If the evaporator fan is not running, the refrigerator compartment will not maintain safe food temperatures. You should check the actual temperature inside the refrigerator and move perishable food to a working refrigerator if cooling is compromised. Continuing to run the unit with a non-functional evaporator fan can also cause the evaporator coil to ice over excessively.
Will resetting my Sub-Zero refrigerator clear error code 35 1 38?
A power reset may temporarily clear the fault code, but if the underlying electrical problem with the fan motor or wiring persists, the code will return once the control board attempts to power the fan again. Clearing the code without addressing the root cause does not restore proper operation and may delay diagnosis while food temperatures rise.
How much does it cost to repair error code 35 1 38 on a Sub-Zero refrigerator?
Repair costs vary depending on the failed component. A replacement evaporator fan motor typically ranges from $50 to $150 for the part, while a control board can range from $200 to $500 or more. Adding labor costs, total repair bills commonly fall between $150 and $700 depending on the diagnosed cause and your location. Sub-Zero appliances often have higher parts costs than standard appliance brands.

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