LG range
showing F1
LG lists F1 and F2 as upper oven thermistor errors.
Mon–Sat, 8am–8pm
- Temperature sensor
- Temperature sensor and thermostat repair
- Source: LG
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What F1
actually means.
LG lists F1 and F2 as upper oven thermistor errors. The thermistor is the probe that tells the control how hot the oven is, so the control cannot regulate heat without it.
LG range display · also shown as F2
What to do when F1 shows on the rangeKind of codeTemperature sensor
The oven sensor sent a reading the control would not accept, or one that climbed well past the setting. A loose plug or a sensor that has drifted is ruled out before the control board, and a temperature that keeps rising means the range is switched off at the breaker first.
Usually leads toTemperature sensor and thermostat repair
A range oven that bakes hot, bakes slow, takes forever to preheat or posts a sensor code, traced to the sensor probe, the thermostat or the calibration.
Shows up asRange Oven Not Heating
The burners or elements on top work, but the oven below stays cold, heats only a little, or never finishes preheating.
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)
F1 comes from LG's range code list; the upper and lower split matters on double-oven models such as the LTGL6937F.
Before you book,
in this order.
Each step comes from LG's own guidance for F1 on its ranges. Follow it to the end: the last card says whether this is a visit.
Press CLEAR/OFF and try the same function again.
If F1 or F2 returns, switch the breaker off for 30 seconds and back on.
Book a visit if the code stays; the sensor is checked with a meter.
Still there?
It usually turns into temperature sensor and thermostat repair. Book with the code and the model number.
What not to do
F1 is not about the lower oven of a double-oven range; that one is F4 or F5.
What you may
notice with it.
The range problems F1 tends to arrive with. Answer these at the range before anyone is booked.
All problems
Range Oven Not Heating
7 causes, cheapest first
Where F1 usually leads
Temperature sensor and thermostat repair.
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
F1 indicates an Upper Oven Thermistor Error.
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. F1 comes from LG's range code list; the upper and lower split matters on double-oven models such as the LTGL6937F.
LG F1 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 F1.
Can I clear F1 myself?
My LG range has only one oven. Can it still show F1?
Why does F1 appear only after my LG oven has been on a while?
Back to your everyday
Still showing F1?
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.