Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error codeF31
ApplianceDishwasher
Quick answer
F31 on a Dynamic Heat Dry LG dishwasher means the Heat Dry fan motor is not operating.
Model compatibility: LG reuses codes across series and model years, so F31 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
F31 means the Heat Dry fan motor does not operate on Dynamic Heat Dry models.
F31 applies to LG dishwashers that feature Dynamic Heat Dry. The display shows it when the Heat Dry fan motor does not operate.
What the manual says
The trouble may lie with a component of the fan motor or the fan motor itself. A detailed inspection is necessary, so request service. That inspection is a technician’s job rather than an owner step.
Call (310) 742-8008 for LG dishwasher repair in Los Angeles. Keep the code and model number ready, and say whether the dishwasher has Dynamic Heat Dry.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your LG appliance?
Book a specialist visit for a clear estimate and approval before any repair.
