LG Dishwasher F31: Heat Dry fan motor warning

Heat Dry fan operation failed on supported models.

ERROR CODEF31Check your exact model

No verified model list is available for this code

A manufacturer code/support source may be available, but no exact supported model has been documented for this record. Do not treat the code as a model-specific diagnosis without checking the manual.

Verify the full model number against the manufacturer manual.

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What does this code mean?

Heat Dry fan operation failed on supported models.

Source scope: LG Dynamic Heat Dry özellikli modeller Always check your exact appliance manual.

Manufacturer code family matched

This code and broad meaning appear in manufacturer support material. Applicability to your exact model is not yet proven. Confirm your full model designation in the official manual.

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What can you try?

  1. 01

    Record the exact code and when it appeared

    Note every letter and digit, the stage of the cycle and the full model label. Error meanings can vary between models.

    What the result means: This prevents applying guidance for a different model or a similar-looking code.

  2. 02

    Check doors and airflow

    Ensure drawers and food packages do not prevent doors sealing; do not block the interior vents. Never open the refrigerant circuit.

    What the result means: Poor closure can cause a temperature rise, but a code alone does not identify a failed part.

  3. 03

    Protect perishable food

    If cooling is clearly inadequate, move perishables to reliable cold storage and limit door openings. Contact support if the code persists.

    What the result means: Food safety takes priority over repeated restart attempts.

Stop immediately for leaks, smoke, burning smell or electrical danger. For gas leaks, leave the area and call local emergency services.

How do you actually fix this?

Start with safe checks. Some codes have no safe home fix; in that case we explain what the professional repair actually involves.

Practical fixes you can try

  1. Stop the dishwasher and allow hot parts to cool. Check that any user-visible exhaust opening is not blocked by dishes or objects.
  2. Clean only a user-maintained filter or duct explicitly described in the model manual. Never remove an appliance panel to reach the drying fan.
  3. Stop repeated heated cycles if drying remains poor, the fan rubs or the code returns.

If it persists, how is it actually repaired?

A technician checks the drying fan supply, rotation feedback and duct restrictions to the model specification, clearing blockage or repairing a proven failed fan or connection.

How do you know it is fixed? Drying should complete without grinding, abnormal fan noise or the same code.

Safety and warranty: Warranty terms depend on manufacturer, model and local law. Damage caused by unauthorised disassembly or improper repair may be excluded. Live electrical work, gas, refrigerant circuits and sealed cabinets require qualified professionals; this is not a DIY instruction for those tasks.

Evidence: The manufacturer link above supports the broad code meaning. The repair pathway is a general technical diagnostic explanation, not a confirmed failed-part diagnosis for every model.

Manufacturer source

Independent safety-focused explanation with a manufacturer link. Possible causes are not verified part diagnoses; the code may vary by model or region.

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