Written by
Nadia Okafor Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeu (underlined u)
ApplianceRange
The symbol
A pot bottom over a surface is drawn as an underlined u. It belongs to Samsung induction cooktops and ranges only, and it signals a Pan Detection Error.
Pan check
Size: does the pan suit that element?
Material: is it cookware an induction element can use?
Position: does it sit correctly on the element?
Consequence
Cookware that does not suit the element will not heat. If the cause is left alone, the element turns itself off after 1 minute.
Other range displays
See tESt for Demo mode, and S-01 for the safety shutoff.
Model compatibility: Samsung reuses codes across series and model years, so u (underlined u) may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
The underlined u is an induction Pan Detection Error caused by cookware that is unsuitable in size, material or position.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
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