Written by
Marcus Lindqvist Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeF42 error
ApplianceRange
The short reading
Code
Meaning
Owner step
F42
Voltage error
Breaker off 30 seconds, then on
LG writes the entry for ranges and ovens generally, so no single series is picked out.
Doing the reset
Begin at the breaker panel: power off, count to 30 seconds, power on, then look at the display. Do not open the panels while the unit has power.
If the issue continues
The manual’s last line is that the unit will require service.
Codes in the same neighbourhood
See F36 (transistor error), F38 (communication error between main board and inverter) and F45 (fan error).
LG range service across San Francisco
We serve San Francisco and the surrounding Bay Area for LG ranges. Dial (415) 223-7887, give the code F42, the model number and what you did at the breaker. The LG range and oven repair page adds context.
Model compatibility: LG reuses codes across series and model years, so F42 error 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 is a voltage error on LG ranges and ovens.
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.
