- Appliances
- Cooktops
u
Samsung induction hob code u: cookware not detected
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
An underlined u symbol on a Samsung induction cooktop indicates a pan detection error because no cookware is on the zone, or the pan is not magnetic or is the wrong size. Use flat-bottomed magnetic cookware matching the zone minimum diameter, and restart with the Power button if necessary.
Safety first
Stop and check this first
- Do not leave knives, forks, spoons, or lids on the hob surface as they can get hot if a zone switches on, and note that the corresponding cooking zone switches off after 1 minute if suitable cookware is not detected.
Safe checks you can perform
- Test the cookware base with a magnet and verify it is not convex
- Match the magnetic base diameter to the cooking zone and center the pan
- Restart the cooktop with the Power button and test a second magnetic pot
Leave these tasks to a qualified professional
- Do not attempt this professional task: Diagnose persistent pan-detection error with a qualified service technician
- Do not attempt this professional task: Authorised cooktop repair and post-repair test with magnetic cookware
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.
Diagnose persistent pan-detection error with a qualified service technician
What they doWhen the underlined u symbol persists despite using flat magnetic cookware of the required minimum diameter and restarting with the Power button, a qualified Samsung technician records the code and operating conditions to diagnose the cooktop.
They must show youthe underlined u code and the test condition observed using suitable magnetic cookware.
In writingrecorded u code, cookware test conditions, and technician diagnostic findings on the service order.
Authorised cooktop repair and post-repair test with magnetic cookware
What they doWith the appliance disconnected from the mains supply, the qualified service technician performs the required repair and tests each cooking zone with suitable magnetic cookware to confirm that the u symbol clears automatically.
They must show youautomatic clearance of the u symbol and normal heating when suitable cookware is placed on the zone.
In writingitemized service work on the invoice and post-repair pan-detection test results across cooking zones.
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 cookware base with a magnet and verify it is not convex
- Who:
- user
- How:
- Hold a magnet against the bottom of the pot or pan to confirm it sticks firmly (steel, enamelled steel, cast iron, or induction-labelled stainless steel). Verify that the base is flat and thick: when cold it may be slightly curved inward (concave), but it must never be curved outward (convex) or have raised rims.
- Result that matters:
- The magnet sticks firmly to the bottom and the pan base sits flat on the cooking zone without bowing outward.
- If The cookware material and bottom shape are suitable; check the zone diameter requirement next.
- If If a magnet does not stick or the bottom is curved outward (convex), switch to suitable induction cookware.
- Evidence to keep:
- Magnet adhesion test on the pan bottom and confirmation that the base is not convex.
Evidence: Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
Match the magnetic base diameter to the cooking zone and center the pan
- Who:
- user
- How:
- Center the cookware on a cooking zone that matches the diameter of the magnetic portion of its bottom (on model NZ63M3707AK, the minimum bottom diameter is 120 mm for the 140 mm and 180 mm zones, and 180 mm for the 280 mm zone).
- Result that matters:
- When suitable cookware of the required size is centered on the zone, the displayed u message automatically disappears.
- If Pan detection succeeded; if 1 minute already passed and the zone switched off, turn the zone back on.
- If If the underlined u remains displayed, proceed to restart the cooktop and test another pot.
- Evidence to keep:
- Automatic clearance of the underlined u symbol when a properly sized pan is centered.
Evidence: Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
Restart the cooktop with the Power button and test a second magnetic pot
- Who:
- user
- How:
- Restart the cooktop using the Power (On/Off) button to clear the error code if necessary, and test the zone using a second flat-bottomed cast-iron or enamelled steel pot of the correct diameter.
- Result that matters:
- After restarting with the Power button, the cooking zone recognizes the second pot and heats normally.
- If The first pan was the wrong size or lacked sufficient magnetic material in its base.
- If If the underlined u persists across zones despite using flat magnetic cookware of the proper size, record the model and serial number and contact Samsung Support.
- Evidence to keep:
- Pan detection result after restarting with the Power button and testing a second magnetic pot.
Evidence: Meaning of the error codes displayed on your Samsung cooktop · Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
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
- Samsung
- 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 Samsung induction cooktops (including the NZ63M3707AK model), an underlined u symbol is a pan detection error: it appears when no cookware is placed on the cooking zone, when the pan is not magnetic, or when it is the wrong size (too small) for that element. According to Samsung documentation, if suitable cookware is not detected the corresponding cooking zone switches off after 1 minute, whereas placing suitable magnetic cookware causes the message to disappear automatically. If necessary, Samsung advises restarting the cooktop using the Power button to clear the error code.
Warnings and stop conditions
- Mediumsource verified
Do not leave knives, forks, spoons, or lids on the hob surface as they can get hot if a zone switches on, and note that the corresponding cooking zone switches off after 1 minute if suitable cookware is not detected.
Evidence: Meaning of the error codes displayed on your Samsung cooktop · Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
Symptoms and causes
Probable causes · in order
- Non-magnetic cookware material or no pan placed on the active zoneCommon
The underlined u symbol appears when no pan is on the cooking zone or when cookware made of aluminum, copper, brass, glass, ceramic, porcelain, or non-magnetic stainless steel is used.
Evidence: Meaning of the error codes displayed on your Samsung cooktop · Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
- Magnetic bottom diameter too small for the element or pan off-centerCommon
The pan is not detected if its magnetic base is smaller than the minimum diameter required for the zone (120 mm for 140 mm and 180 mm zones, or 180 mm for the 280 mm zone on NZ63M3707AK) or is placed off-center.
Evidence: Meaning of the error codes displayed on your Samsung cooktop · Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
- Convex (outwardly curved) or raised-rim pan bottom, or persistent faultLess common
Samsung specifies that cookware bottoms must never be curved outward (convex) or raised on rims; if underlined u persists despite using flat magnetic cookware of the proper size, service is required.
Evidence: Meaning of the error codes displayed on your Samsung cooktop · Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
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
Meaning of the error codes displayed on your Samsung cooktop
Samsung · 2026 · official_doc
- 2
Samsung Manual de usuario placa de inducción NZ63M3707AK (16166000A14222)
Samsung · 2025 · manual
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