LG range
showing F42
LG uses F42 for a voltage error: the supply reaching the range is outside what the control expects.
Mon–Sat, 8am–8pm
- Controls and communication
- Knobs, switches and controls
- Source: LG
Book a visit
Three short steps, about a minute.
or call (844) 875-7576
Loading appointment form…
The appointment form couldn’t load. Please try again.
What F42
actually means.
LG uses F42 for a voltage error: the supply reaching the range is outside what the control expects. The house wiring or the range connection may be involved.
LG range display
What to do when F42 shows on the rangeKind of codeControls and communication
The display, the main board or the induction power board lost contact with one another, or one of them failed its own self-check. A power dip, a loose cable or moisture from a boil-over is ruled out before a board is replaced, and a range that keeps heating while this code shows is switched off at the breaker.
Usually leads toKnobs, switches and controls
Knobs that spin or crack, touch keys that do nothing, blank displays, clocks that reset and control boards that switch the wrong thing.
Shows up asRange Keeps Tripping the Breaker
The range breaker trips when you switch on an element, the oven or self-clean, or it trips by itself with the range idle.
MakeLG
A Korean electronics group selling freestanding and slide-in ranges on gas, electric and induction, many with Wi-Fi.
SourceLG Help Library "LG Range - Error Codes List" (Wayback copy, 23 Jun 2025)
F42 is on LG's Help Library list of range codes, archived on 23 Jun 2025; the list names no models.
Before you book,
in this order.
Each step comes from LG's own guidance for F42 on its ranges. Follow it to the end: the last card says whether this is a visit.
Switch the breaker off, wait 30 seconds and restore power to clear F42.
If F42 returns, leave the breaker off and have the supply and range connection checked.
Still there?
It usually turns into knobs, switches and controls. Book with the code and the model number.
What not to do
F42 is not a board error inside the oven; LG links it to voltage.
What you may
notice with it.
The range problems F42 tends to arrive with. Answer these at the range before anyone is booked.
All problems
Range Keeps Tripping the Breaker
6 causes, cheapest first
Where F42 usually leads
Knobs, switches and controls.
LG
ranges.
A Korean electronics group selling freestanding and slide-in ranges on gas, electric and induction, many with Wi-Fi.
LG range repair
Gas range
Open flames on top and a gas-fired oven below, all fed by one supply line behind the range and lit by igniters rather than a match.
Electric range
Coil elements or radiant elements under a smooth glass top, with an electric oven below, all running on a dedicated 240-volt circuit.
Dual-fuel range
Gas burners on top and an electric oven below, the combination most professional-style ranges use, needing both a gas line and a 240-volt circuit.
In LG's own words
F42 indicates a Voltage Error.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. F42 is on LG's Help Library list of range codes, archived on 23 Jun 2025; the list names no models.
LG F42 range repair,
where we come out.
The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about F42.
Can I clear F42 myself?
Could F42 on my LG range be caused by my home wiring?
Is it safe to keep using an LG range that shows F42?
Back to your everyday
Still showing F42?
Book with the code exactly as it appears, the full model number, and whether you notice any smell of gas or scorching — with a code, that is where the diagnosis begins.