Appliance
LG ranges
LG's cooking catalog runs to 397 products and the ranges are the center of it: LRE for electric, LRG for gas, with slide-in and freestanding cabinets, induction tops, ProBake convection that moves the element to the back wall, and InstaView doors you knock on to light. The published code list is the F-series, and it is more useful than most because the numbers separate the upper oven from the lower one and the oven from the cooktop.
- 3 symptoms we are called out to
- From $95 diagnostic, credited to the repair
- 59 cities and neighborhoods covered
- OEM parts available on order
The short version
What this equipment is, for a repair
Configurations
Electric · gas · dual fuel · induction · slide-in and freestanding · ProBake · InstaView
Access
Planned before the visit, not discovered on arrival
Parts
OEM, available on order
Diagnostic
From $95, credited to the repair
What goes wrong with it
Symptoms we are called out to on LG ranges
Each one covers the likely causes in the order they are worth checking, and what to do in five minutes before booking anything.
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It lights up, it counts down, and it stays cold Oven not heating
An oven that will not heat divides cleanly on this make, because LG tells you which half you are in. A code means the machine has found something and named it. No code at all means the oven believes it is heating, which points somewhere different — at the element, the igniter, or the supply.
- The F number names the cavity: F1 and F2 upper, F4 and F5 lower
- On electric, look at the bake element cold — a break is often visible
- On gas, an igniter that glows and never lights is the classic failure
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It says 350 and it is not 350 Oven temperature is wrong
There are three quite different things behind this and they need different answers: an oven that is out by a consistent amount, an oven that swings, and an oven that is fine but is being judged by a thermometer that is not. Establishing which one you have is most of the job.
- Consistently out is calibration; swinging is the sensor
- Measure at the middle shelf, not at the door and not by eye
- Most of these can be offset from the panel without any parts
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One zone is dead and the rest are fine Cooktop burner not working
One burner out of four is the good version of this problem, because it usually rules out everything shared — the supply, the board, the controls. What it points at depends entirely on the kind of top, and LG sells three: induction, radiant electric and gas.
- One zone dead is better news than several: the shared parts are fine
- Induction has coils and sensors rather than elements — F33 and F34 are its codes
- On gas, cleaning the cap and ports fixes more of these than parts do
What we do on it
Repairs we carry out on LG ranges
Starting figures for this equipment in South Florida. The exact cost is confirmed after an on-site diagnostic — and this is not the whole list of what can go wrong, so call if your problem is not here.
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from $95 Diagnostic visit
One visit, one technician, one answer in writing. On this make the diagnostic starts with something most makes cannot offer: the appliance usually has something to say. LG publishes code lists for its refrigerators, dishwashers, washers, dryers and ranges, and on the machines with no display it publishes what the blinking lights mean instead. Reading that properly is half the job and it costs nothing to do.
- The model number and whatever the appliance is reporting, read before anything is opened
- Blinking-light patterns included, because LG documents them and that makes them codes
- Written findings and a from-price before any part is ordered
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from $125 Appliance maintenance
The visit that stops the other visits. Most of what fails on an LG in this city fails because of something that could have been cleaned: a condenser packed with dust, a dishwasher filter nobody has taken out, a dryer duct that has been closing for three years. None of it is glamorous and all of it is cheaper than the repair it prevents.
- Condenser, filters, seals, drains and levels on whatever you have
- Written findings, so you know what is aging before it fails
- Priced on time rather than per appliance
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from $145 Appliance installation
Delivery is not installation. A machine that has been put in place is level, connected, tested, and standing with the clearances its manufacturer specifies — and on LG's ventless laundry and its built-in cooking there are specifics that get missed often enough to be worth naming.
- Leveled and tested, not just connected and left
- Clearances checked, because a built-in with no vent path fails in August
- Gas connections leak-tested and documented
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from $175 Oven element replacement
Bake or broil, and on an electric oven the failure is often visible from the doorway: a blistered, split or broken loop. The part is straightforward and the terminals behind the rear wall are the fussy half.
- Often diagnosable by eye before anything is opened
- F6, F9 and F19 are LG's heating codes
- The terminals behind the cavity wall are the real work
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from $135 Oven sensor calibration
An oven that is consistently out by twenty or forty degrees is measuring slightly wrong and doing exactly what it is told. That is what the offset in the control menu is for. An oven that swings is a different thing and needs the sensor, and telling the two apart takes half an hour with a probe.
- Steady error is calibration; a swing is the sensor
- Measured against a probe, not against the display
- Most LG ovens offer an offset of up to about 35°F
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from $185 Oven door repair
An oven is a box with one deliberately weak side. A hinge that has dropped, a spring that has tired or a glass pack that has separated all let heat out of the top corner, and the consequence is a cavity that preheats slowly, cooks unevenly and always seems to need longer than the recipe says — with a sensor that measures perfectly well.
- Slow preheating and uneven cooking with a good sensor is usually the door
- The door is heavier than it looks and the alignment is the job
- F10 and F20 are the lock rather than the hinge
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from $185 Range igniter replacement
Two different igniters live on a gas range and they are not the same job: the surface igniters that spark the cooktop burners, and the oven igniter that has to draw enough current to open the gas valve. Both are ordinary repairs and both are preceded by the cleaning that fixes a good proportion of them for nothing.
- Cleaning the caps and ports fixes more dead burners than parts do
- An oven igniter that glows can still be too weak — it is measured
- Moisture in the assembly is a real cause in this climate
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from $265 Induction cooktop repair
An induction top has no element to fail. It has a coil per zone, a temperature sensor under each, and an inverter board driving them — which is why a single dead zone is the good version of this problem and several at once is not. F33 and F34 are LG's front burner sensor codes and they exist on nothing else in the range.
- One zone dead is a coil or a sensor; several is the board
- F33 and F34 are induction-only codes
- The glass comes up, and the parts underneath are dearer than radiant
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from $195 Cooktop element repair
On a radiant top the element is under the glass and it fails open, which is measurable. The half people forget is the connector underneath it: it corrodes, it burns, and a new element onto a burnt connector fails early.
- Elements fail open and are measured, not guessed
- The connector under the element is half the repair
- F3 and the water-on-the-panel condition are controls rather than elements
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from $285 Appliance control board repair
The board is the last thing suspected rather than the first, because supply problems imitate it perfectly: a long extension lead, a shared circuit with something heavy on it, or a socket with a poor neutral will all produce board errors on a machine that is otherwise healthy. A second board fails exactly the way the first one did.
- The supply is checked first, every time
- EE on a washer and F11 on a range are board-level codes
- A board replaced without finding what killed it is a repeat visit
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from $115 Smart diagnosis and firmware service
LG builds diagnostics into these machines that most makes do not: a connected app, a stored history, and on many models an audible diagnosis the machine plays down a phone line. When that side stops working the appliance still washes and still cools — but you lose the reporting, and on this make the reporting is worth having.
- Connectivity, firmware and the app-side diagnosis
- The machine works without it; you lose the instrumentation
- Often a network problem rather than an appliance one
In more detail
About LG ranges
Four ways of making heat
Electric radiant, gas, dual fuel — gas on top and electric below — and induction, which LG has pushed harder than most in the last few years. The cabinet is slide-in, which overlaps the counter and hides its controls at the front, or freestanding, which has a back console. ProBake Convection moves the element from the roof of the cavity to the back wall, and Air Fry is a cycle rather than a part.
The F-numbers, read properly
The list runs F1 to F34 plus H5, PF and 5b, and it repays reading because the number carries a location. F1 and F2 are the upper oven thermistor; F4 and F5 are the lower. F10 is the upper door lock and F20 the lower. F17 and F7 are convection fans. F21 through F25 are the steam sensor on machines that have one. F27 is a cooling fan stalled during self clean, which is the one to stop using the oven over. F33 and F34 are the front induction burner temperature sensors, and they only exist on an induction top.
This article is based on:
- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards
Before you book
Questions about LG ranges
The oven will not heat and the display shows an F number.
Then you already have the diagnosis and it is worth reading before anything is unplugged. F1 and F2 are the upper oven thermistor, F4 and F5 the lower one. F6 and F9 are upper oven heating failures. F10 and F20 are the door locking system, upper and lower. F19 is an oven heating error outright. LG's own first step for all of them is the same — clear the code, and if it comes back, cut the breaker for thirty seconds — and the ones that survive that are genuine.
The oven runs hot or cold by a good twenty degrees.
That is calibration or the sensor, and they are not the same thing. The sensor is a probe in the cavity wall with a resistance you can measure; a sensor that has drifted reports the wrong number and the oven obediently holds the wrong temperature. Calibration is an offset you can set yourself on most of these. We check with a probe of our own before touching either, because an oven that is twenty degrees out on a thermometer that is twenty degrees out is a failure nobody has.
One burner clicks and will not light.
On gas that is the igniter or the path to it, and the sound tells you which. Clicking with no flame means spark is arriving and gas is not — a burner cap seated crooked, a port blocked by something that boiled over, or moisture in the assembly, which in this climate is a real cause. No clicking at all is the switch or the module. Cleaning the cap and the ports properly answers more of these than any part does.
What is 5b on the display?
Sabbath mode, and it is not an error. It is a setting that fixes the temperature and disables the timer, the light and the alarms, and it is easy to enable by accident. LG's own way out of it is to press Bake, set a temperature, press Start, then hold Clock for three seconds. H5 is the same kind of thing on the cooktop: a hot-surface indicator, not an error.
Where we do it
Across Miami-Dade, Broward, and Palm Beach
Same terms everywhere we go: an on-site diagnostic first, the price agreed in writing, and the exact figure confirmed once we have seen the unit.
Neighborhoods people ask for by name