Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error code4
ApplianceCooktop
Quick answer
Code 4 on an LG cooktop means metal objects or water have been in contact with the touch pads for a prolonged time.
Model compatibility: LG reuses codes across series and model years, so 4 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
Metal objects or water have been in contact with the cooktop touch pads for a prolonged time.
When an LG cooktop shows 4, the display is reporting a problem at the touch pads: metal objects or water have been in contact with them for a prolonged time.
What to do
Clean the cooktop surface and take any objects off the touch pads. Then check whether the code has cleared.
Codes that show up nearby
Code 5 is a display fault, which is worth comparing if the screen itself looks wrong.
Code 6 reports low voltage rather than a touch pad problem.
Code 3 is a thermistor error, a different fault from touch pad contact.
LG cooktop repair in Los Angeles
If code 4 stays on after the surface is clean and clear, book LG cooktop repair in Los Angeles. Call (310) 742-8008 and have the code, the cooktop model number and what you already cleaned ready.
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.
