Written by
Maya Chen Editorial TeamPublished October 20, 2026
Error codeF42
ApplianceRange
Quick answer
LG lists F42 as a voltage error. The manual asks for a circuit breaker reset of 30 seconds.
Model compatibility: LG reuses codes across series and model years, so F42 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
F42 means a voltage error on LG ranges and ovens.
On an LG range, F42 is reported when the control finds a voltage error.
The manual entry is written for ranges and ovens in general, so no single series is singled out.
Reset steps
Begin with a breaker reset. Leave the breaker off for 30 seconds before turning it on.
When the code stays on
Where the code survives the reset, or the reset cannot be carried out, plan on having the unit serviced.
Other LG range codes
If the display differs, check F36 (transistor error), F38 (main board and inverter communication error) and F45 (fan error).
Range service in Los Angeles
For LG range and oven service in Los Angeles, phone (310) 742-8008. More about LG range repair is on the service page. Mention that the display shows F42 and give the model number.
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.
