Written by
Marcus Lindqvist Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeF31
ApplianceDishwasher
F31 in plain terms
Only dishwashers equipped with Dynamic Heat Dry display F31. The panel shows it once the fan motor that drives Heat Dry has stopped running.
Why LG calls for an inspection
LG’s guide places the fault either in a part tied to the fan motor or in the motor itself. Sorting out which one needs a close, detailed inspection, and the guide gives the owner nothing to adjust. Its single instruction is to request service.
Codes that sit nearby
F35 appears when the temperatures of the Heat Dry components cannot be read.
F37 means the Auto Open Door feature is not working.
FE concerns leakage or overfilling, and its guidance covers water poured into the Heat Dry blower.
LG dishwasher repair in San Francisco and the Bay Area
Dishwasher owners in San Francisco and around the Bay Area can read about LG dishwasher repair or phone (415) 223-7887 to arrange a visit. Have F31, the model number and the Dynamic Heat Dry detail written down before calling.
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 is reported when the Heat Dry fan motor of a Dynamic Heat Dry dishwasher stops running.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your LG appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
