Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error codeF3
ApplianceMicrowave
Quick answer
F3 on an LG microwave can occur when foreign substances sit around the touch button panel.
Model compatibility: LG reuses codes across series and model years, so F3 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
Foreign substances around the touch button panel.
On an LG microwave, errors begin with the letter F and appear as a number on the display. F3 can occur when there are foreign substances around the touch button panel.
What to try
Wipe any foreign substances off the touch button panel and check again.
If the code is still there, unplug the electrical cord and plug it back in to see whether the same error reappears.
Symptoms can come from a temporary error. If they persist, call for an inspection for an accurate diagnosis. Other F errors can point to defective parts, a short circuit, communication failures or overcurrent, which is a job for a service technician.
LG microwave service in Los Angeles
For LG microwave repair in Los Angeles, call (310) 742-8008. Have your model number and the code on the display ready, and mention that you cleaned the panel.
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.
