Sub-Zero error code · 35 r 34
Sub-Zero Code 35 r 34: Refrigerator Evaporator Fan Speed Fault
Sub-Zero Code 35 r 34 means the refrigerator evaporator fan runs slower than its setting and may be shorted. Test the fan and replace the motor if faulty.
Sub-Zero Code 35 r 34 means the refrigerator evaporator fan is running slower than its commanded setting and the control is checking for a shorted fan. The fix is to verify the fan motor is not shorted and replace the refrigerator evaporator fan motor if it tests faulty.
The meaning of 35 r 34
This code indicates the refrigerator evaporator fan reported a speed below the value the control commanded, while the control checks whether the fan motor is shorted. A short in the motor or its feedback circuit can pull speed away from the commanded value. Because the fan is not tracking its setting, the control flags it as faulty.
The part usually behind 35 r 34
- Refrigerator evaporator fan motor — Replace if the motor or its feedback circuit tests shorted or runs slower than commanded
- Fan motor wiring harness — Replace if conductors are shorted, pinched, or chafed
Root causes behind 35 r 34
A shorted winding or shorted speed-feedback line can keep the motor from holding its commanded speed. A pinched or chafed harness can short conductors and corrupt the speed signal. A failing motor with a degraded control or feedback circuit can also run slower than its setting.
Signs of 35 r 34
- Code 35 r 34 displayed in the service menu
- Refrigerator section warming or holding poorly
- Reduced airflow from the fresh-food vents
- Fan speed that does not respond to normal cycling
- Unusual motor or airflow noise from the fan area
Most-likely causes
- Shorted refrigerator evaporator fan motor winding
- Shorted or crossed fan speed-feedback wiring
- Pinched or chafed fan harness
- Damaged motor speed-control circuit
- Faulty connector at the fan motor
Safe owner checks
- Note whether airflow from the fresh-food vents seems weak
- Confirm refrigerator temperatures against the set point
- Avoid disturbing wiring at the rear evaporator panel
- Record when the code appears for the technician
When professional service is needed
Confirming a shorted or underspeed fan motor requires metering the motor and feedback circuit behind the evaporator panel, and replacing the fan motor should be done by a qualified technician.
Frequently asked
Common questions about Sub-Zero 35 r 34
What does Sub-Zero Code 35 r 34 mean?
Code 35 r 34 means the refrigerator evaporator fan reported a speed below what the control commanded, and the control is checking the motor for a short. A shorted winding or feedback line can pull the fan's speed away from its setting. Because the fan is not tracking its commanded speed, the board flags it as faulty and fresh-food cooling suffers.
Can I fix 35 r 34 on my own?
This is not an owner repair. You can note whether airflow from the fresh-food vents seems weak, confirm refrigerator temperatures against the set point, and avoid disturbing the wiring at the rear evaporator panel. Confirming a shorted or underspeed motor requires metering the motor and its feedback circuit behind the panel, so leave the repair to a technician.
How do I clear code 35 r 34?
The code clears after the shorted refrigerator evaporator fan motor or its pinched feedback harness is replaced and the fan holds its commanded speed; a power cycle then removes 35 r 34 from the service menu. It will not clear while the short or speed fault remains, since the fan keeps drifting off its setting.
Is it safe to keep using the refrigerator with 35 r 34 active?
It is a medium-severity code. The fan not holding speed reduces airflow to the fresh-food section, so the refrigerator may warm or hold poorly and risk food over time, and the underlying short can worsen. The unit keeps running, but you should have the fan motor or harness checked soon.
Which part does 35 r 34 involve and what does service cost?
The typical fix is the refrigerator evaporator fan motor if its winding or feedback circuit tests shorted or underspeed, or the fan motor wiring harness if conductors are pinched or chafed. We charge a flat $89 diagnostic applied to the repair, with a 365-day warranty. Call (650) 668-1554 to schedule.
How does 35 r 34 differ from the refrigerator fan code 35 r 33?
Both affect the refrigerator evaporator fan, but 35 r 33 is a clear obstruction or drag fault where the fan simply cannot reach full speed, often from ice or debris. 35 r 34 is a speed-fault where the control suspects a short in the motor or feedback wiring pulling the fan off its commanded speed. A technician confirms 35 r 34 by metering for a short rather than just clearing an obstruction.
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