LG Dishwasher Error Code F31 — Heat Dry Fan Motor Error
What this means
The F31 error code is displayed when the heat dry fan motor does not operate. This code only appears on LG dishwasher models equipped with the Dynamic Heat Dry feature. The fan motor is responsible for circulating hot air during the drying phase to improve drying performance. A faulty motor, wiring issue, or control board problem can cause this error.
Step-by-step fix
2 stepsPower-cycle the dishwasher
Turn off and unplug the dishwasher for 1 minute, then restore power and run a cycle.
Run a wash cycle without Heat Dry
Try running a wash cycle with the Heat Dry option turned off to confirm the dishwasher works otherwise.
When to call a professional
The heat dry fan motor or its control circuit requires professional diagnosis and replacement.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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