Samsung Oven & Range underlined u: What the Display Means
The **underlined u** display on a Samsung oven or range points to **pan detection error on induction range/cooktop surface**. Treat it as a diagnostic direction rather than a parts order: operating conditions, wiring, sensors, actuators, and control electronics can overlap. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **underlined u**. Search normalization stores it as **UNDERLINEDU** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeUNDERLINEDU
ApplianceOven & Range
Quick answer
Pan detection error on induction range/cooktop surface.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so UNDERLINEDU 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** display on a Samsung oven or range points to **pan detection error on induction range/cooktop surface**. Treat it as a diagnostic direction rather than a parts order: operating conditions, wiring, sensors, actuators, and control electronics can overlap. A display code is evidence from the control system, not a component test result. That distinction matters because a connector, supply condition, obstruction, or feedback signal can mimic a failed component. The recorded display form is **underlined u**. Search normalization stores it as **UNDERLINEDU** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
On affected Samsung oven or range models, the display appears while the appliance is otherwise able to respond normally.
The underlined u display becomes more meaningful if the message may be tied to a mode, test, reminder, setup state, or protective condition rather than a failed part.
A symptom that fits underlined u is that normal operation may resume after the documented mode or condition is cleared.
underlined u can be accompanied by this pattern: underlined u appears on the display while the appliance reports: Pan detection error on induction range/cooktop surface.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Pan detection error on induction range/cooktop surface
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
With underlined u recorded, confirm the exact display characters and appliance model before treating the message as an issue.
The next non-invasive check is to check the user-facing setting, mode, door, filter, container, or setup condition named by Samsung for this display.
Before requesting service for underlined u, use the model-specific manual to clear the status; avoid repeated resets if the message returns unexpectedly.
For underlined u, start by doing this: record the exact code and model number.
As an external check for underlined u, check door/divider/pan placement, vent obstruction, settings, and household power only when relevant.
A safe owner-level check is to do not perform live high-voltage internal testing; request service if the code reappears.
Important safety warning. Stop for arcing, repeated breaker trips, uncontrolled heating, damaged wiring, or gas odor. Internal live-voltage and gas-system diagnosis is not a homeowner check. Do not bypass a safety device merely to see whether underlined u disappears.
Get help
When to request repair service
Service is not automatically required. Request diagnosis only if the status cannot be cleared as designed or normal operation does not resume. In a service visit for underlined u, model-specific testing should follow the pan detection error on induction range/cooktop surface circuit rather than treating the code as proof of one failed part.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
Pan detection error on induction range/cooktop surface.
A single documented power reset can help after an external condition or power event is corrected. If **underlined u** returns at the same stage, repeated resets only erase useful evidence and do not repair the cause.
The display can be normal in the documented context. If **underlined u** appears unexpectedly, cannot be cleared, or prevents normal operation, then the issue deserves diagnosis.
Treat **underlined u** as a starting point, not a replacement instruction. Wiring, feedback signals, operating conditions, and electronic controls can mimic a failed component.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Oven & Range underlined u** separate from same-looking codes used by other Samsung appliance families.
