LG stove shows F42 voltage error
F42 is LG's voltage error.
Mon–Sat, 8am–8pm
- Control board and power
- Control board and display repair
- Source: LG
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What F42
actually means.
F42 is LG's voltage error. It points at the power reaching the stove, such as a loose breaker, a weak connection at the cord or house wiring, rather than a part inside.
LG stove display
What to do when F42 shows on the stoveKind of codeControl board and power
The main board failed its own start-up check, lost contact with the display, or saw the supply voltage sag too low, often after a storm, a power outage or a spill that ran down behind the panel. The breaker, the cord and the outlet are ruled out before a board is replaced. A stove that sparks, smells of hot wiring or keeps heating while this code shows is switched off at the breaker first.
Usually leads toControl board and display repair
Stoves with a blank or flashing display, touch keys that do not answer, codes that keep returning or a stove that will not turn on, traced to the board, the keypad or the power to them.
Shows up asStove Won't Turn On
Nothing happens anywhere on the stove: no burner heats, the oven stays cold, the clock and lights are dark, or the display lights up but nothing will start.
MakeLG
The Korean electronics maker whose freestanding and slide-in stoves often come with app controls.
SourceLG Help Library: range error codes list (Wayback, 23 Jun 2025)
Where F42 is documented: LG's Help Library code list (Wayback copy of 23 June 2025); the list names no models, so the rating label decides whether your stove can show it.
Before you book,
in this order.
Each step comes from LG's own guidance for F42 on its stoves. Follow it to the end: the last card says whether this is a visit.
Switch the stove's breaker off for 30 seconds and back on.
If other lights or appliances in the house flicker or dim, have an electrician check the supply.
If you smell burning or see scorching at the outlet or cord, keep the breaker off.
Book a visit if F42 returns with a normal supply.
Still there?
It usually turns into control board and display repair. Book with the code and the model number.
What not to do
F42 is not a heating element or sensor code. The supply gets checked before any stove part is blamed.
What you may
notice with it.
The stove problems F42 tends to arrive with. Answer these at the stove before anyone is booked.
All problems
Stove Won't Turn On
6 causes, cheapest first
Where F42 usually leads
Control board and display repair.
LG
stoves.
The Korean electronics maker whose freestanding and slide-in stoves often come with app controls.
LG stove repair
Gas stove
A stove with gas burners on top, whether its oven below runs on gas too or on electricity, fed by one gas line behind it and plugged into a wall outlet for the spark.
Electric stove
A stove that runs entirely on electricity through a heavy cord and a large outlet behind it, with coil burners that lift out or a smooth glass stovetop with elements under it.
Induction stove
A stove with a flat glass top that heats the pan itself through a magnetic field, run by touch keys and power boards, with an electric oven underneath.
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. Where F42 is documented: LG's Help Library code list (Wayback copy of 23 June 2025); the list names no models, so the rating label decides whether your stove can show it.
LG F42 stove 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?
My LG shows F42 during storms or heat waves. Why?
Could a loose wire at the outlet cause F42 on my LG?
Should an electrician or an appliance technician look at F42 on my LG?
Back to your everyday
Still showing F42?
Book with the code written exactly as the stove shows it, the full model number, and whether you notice any smell of gas or hot wiring — when there is a code, that is where the diagnosis starts.