LG double oven stove shows F4 or F5
On LG double-oven stoves, F4 and F5 are the lower oven's thermistor codes.
Mon–Sat, 8am–8pm
- Temperature sensor
- Stove oven heating repair
- Source: LG
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What F4
actually means.
On LG double-oven stoves, F4 and F5 are the lower oven's thermistor codes. The upper oven may carry on working while the lower one refuses to heat.
LG stove display · also shown as F5
What to do when F4 shows on the stoveKind of codeTemperature sensor
The thin probe on the back wall of the oven sent the stove a reading it would not trust, or one that kept climbing past the setting. A loose plug behind the stove or a probe knocked against the racks is ruled out before the sensor or the board is replaced. If the oven keeps getting hotter with the controls turned off, switch the stove off at its breaker first.
Usually leads toStove oven heating repair
The oven part of a stove that stays cold, heats slowly or bakes too hot or too cool, fixed at the bake and broil elements, the oven igniter, the gas valve or the temperature sensor.
Shows up asOven on My Stove Won't Heat Up
The burners on top work, but the oven underneath stays cold, heats only a little, or never reaches the temperature you set.
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 F4 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 F4 on its stoves. Follow it to the end: the last card says whether this is a visit.
Clear the code with CLEAR/OFF and restart the bottom oven.
A repeat of the code calls for 30 seconds with the breaker off.
Use the upper oven meanwhile, and book a visit if F4 or F5 keeps coming back.
Still there?
It usually turns into stove oven heating repair. Book with the code and the model number.
What not to do
F4 says nothing about the top oven on an LG double-oven stove. Because LG numbers its sensor codes per cavity, only the bottom sensor needs testing.
What you may
notice with it.
The stove problems F4 tends to arrive with. Answer these at the stove before anyone is booked.
All problems
Where F4 usually leads
Stove oven heating 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
F4 indicates a Lower Oven Thermistor Error
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Where F4 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 F4 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 F4.
Can I clear F4 myself?
Can I keep using the top oven of my LG while F4 is showing?
Why does F5 show on my LG only when I use the bottom oven?
Is F4 on an LG the same repair as F1?
Back to your everyday
Still showing F4?
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.