Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error code3
ApplianceCooktop
Quick answer
Code 3 on an LG cooktop is a thermistor error; the owner steps are brief.
Model compatibility: LG reuses codes across series and model years, so 3 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
Code 3 is a thermistor error on the LG cooktop.
Seeing 3 on an LG cooktop display? It is listed as a thermistor error.
Do this
Press Power ON/OFF.
Switch the unit’s breaker off, count 30 seconds, then switch it on.
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.