- Appliances
- Cooktops
u
LG DIOS induction hob code U: suitable pan not detected
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
A [U] (or u) symbol with a flickering indicator light on an LG DIOS induction cooktop means it was operated without a container, the pan is off-center, or the cookware is incompatible. Use flat-bottomed magnetic cookware covering at least 90% of the burner size and center it on the cross.
Safety first
Stop and check this first
- Do not use containers that magnets do not stick to or porcelain pots that may break or fail to heat properly even with an IH mark, and always align the center of the cookware with the cross symbol on the burner.
Safe checks you can perform
- Test the bottom of the container with a magnet for IH compatibility
- Ensure the bottom is flat and covers at least 90% of the burner size
- Align the center of the cookware with the cross symbol on the burner
Leave these tasks to a qualified professional
- Do not attempt this professional task: Inspect the persistent [U] alert and cookware conditions with LG service
- Do not attempt this professional task: Authorised LG cooktop repair and post-repair heating test
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Inspect the persistent [U] alert and cookware conditions with LG service
What they doIf the [U] symbol and flickering indicator light continue even when a flat-bottomed magnetic container covering at least 90% of the burner is centered on the cross mark, an authorised LG technician records the code and checks the appliance with compatible cookware.
They must show youthe displayed [U] symbol and the test conditions with a centered, flat magnetic container.
In writingverified [U] code, cookware test conditions, and technician diagnostic findings on the service order.
Authorised LG cooktop repair and post-repair heating test
What they doWith the induction cooktop disconnected from mains power, the authorised LG technician completes the necessary repair and tests the burners afterward with suitable cookware to confirm normal heating without the [U] symbol.
They must show younormal container recognition and heating on the burner without the [U] indicator after repair.
In writingitemized service repair on the invoice and confirmation of post-repair operation across the burners.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Test the bottom of the container with a magnet for IH compatibility
- Who:
- user
- How:
- Hold a magnet against the bottom of the cookware: materials that magnets do not stick to cannot be used. Choose iron pans, stainless steel pots, or enamelled porcelain pots with an IH or coil symbol on the bottom (note that even with an IH symbol, a pot may not work if part of its bottom is non-magnetic).
- Result that matters:
- The magnet sticks firmly across the underside of the container.
- If The container material is induction-compatible; check base flatness and burner sizing next.
- If If the magnet does not stick or the pot is aluminum, glass, stone, ceramic, or earthenware, switch to compatible cookware.
- Evidence to keep:
- Firm magnet adhesion across the bottom of the cookware.
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
Ensure the bottom is flat and covers at least 90% of the burner size
- Who:
- user
- How:
- Verify that the cookware has a flat bottom that adheres to the cooktop without feet, protrusions, a rounded shape, or an inwardly curved base, and match it to a burner where the bottom area is at least 90% of the burner size (large 15-22 cm, medium 14-18 cm, small 14-15 cm).
- Result that matters:
- The flat base sits flush against the glass and covers at least 90% of the selected burner.
- If Proceed to align the center of the container with the cross mark on the burner.
- If If the pot bottom is smaller than the burner or has feet or a curved base, use a flat-bottomed container of the proper size.
- Evidence to keep:
- Flat cookware bottom covering at least 90% of the selected burner diameter.
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
Align the center of the cookware with the cross symbol on the burner
- Who:
- user
- How:
- Place the container so that its center is aligned directly with the cross symbol printed in the center of the burner before pressing the touch button to operate the induction zone.
- Result that matters:
- The indicator light stops flickering, the [U] symbol clears, and the induction burner heats normally.
- If The [U] sign was caused by the container being out of position on the burner.
- If If you need more help because [U] remains displayed with centered, flat-bottomed magnetic cookware, contact LG Support.
- Evidence to keep:
- Display response when operating the burner with a flat magnetic pot centered on the cross symbol.
Evidence: [Inducción LG DIOS] No se encenderá
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- LG
- Product type
- Cooktops
Known code variants
- [U]
- detección de recipiente Samsung u
- encimera LG muestra U
- error u encimera Samsung
- error U inducción LG
- LG cooktop U flashing
- LG DIOS induction U
- LG induction hob U sign
- LG U
- placa inducción LG DIOS U
- placa inducción Samsung u
- Samsung hob pan detection u
- Samsung induction cooktop u
- Samsung NZ63M3707AK u
- Samsung u
- símbolo u
- U
- u subrayada
- u symbol
- underlined u
What it means
On LG DIOS induction cooktops, the [U] (or u) symbol appears with a flickering indicator light and stops operation if you press the touch button to operate the induction without a container on the zone, if the container is out of position, or if you use an incompatible container. Because induction uses a coil installed under the burner to create a magnetic field that directly heats iron in the cookware, materials that magnets do not stick to cannot be used, and the flat bottom must cover at least 90% of the burner size.
Warnings and stop conditions
- Highsource verified
Do not use containers that magnets do not stick to or porcelain pots that may break or fail to heat properly even with an IH mark, and always align the center of the cookware with the cross symbol on the burner.
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
Symptoms and causes
Probable causes · in order
- Operating without a container or using non-magnetic incompatible cookware (X)Common
The [U] symbol appears if the burner is turned on without a pot or with incompatible containers such as aluminum/tin, aluminum-nickel (nickel-silver), heat-resistant glass, grill pan, stone, porcelain/ceramic, or earthenware.
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
- Cookware off-center from the cross mark or covering less than 90% of the burnerCommon
If the center of the container is not aligned with the cross symbol on the burner or its bottom area is less than 90% of the burner size (large 15-22 cm, medium 14-18 cm, small 14-15 cm), the [U] symbol is displayed.
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
- Bottom with feet, rounded or inwardly curved base, or persistent [U] alertLess common
Cookware with feet or protrusions, a rounded bottom, or an inwardly curved bottom (or pots marked IH whose bottom is partly non-magnetic) fails to adhere flat against the cooktop and triggers [U].
Evidence: [LG Dios induction] A 'u' sign is visible on the display.
Virtual technician
Does u still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
[Inducción LG DIOS] No se encenderá
LG Electronics · 2025 · official_doc
- 2
[LG Dios induction] A 'u' sign is visible on the display.
LG Electronics · 2025 · official_doc
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