How do I fix error code ONE_KNOB_DARK on a Samsung ovens & ranges?

1. undefined: Check if plastic LED housing is installed correctly 2. undefined: Look for broken plastic fingers that prevent secure attachment 3. undefined: Measure voltage at the specific knob LED connector 4. undefined: If voltage present, LED or lens assembly is faulty 5. undefined: If no voltage, PCB or harness is faulty

Samsung Ovens & Ranges2022–present

Error Code ONE_KNOB_DARK

Q: What does error code ONE_KNOB_DARK mean on a Samsung ovens & ranges?

Single knob backlight circuit failure Plastic LED housing not installed correctly; Broken plastic fingers preventing secure attachment between lens and valve; No voltage at knob LED connector; Faulty PCB; Faulty wire harness

Single knob backlight circuit failure

Minor

Usually easy to fix - may resolve on its own

Also displayed as: One knob LED does not light

What This Means

Plastic LED housing not installed correctly; Broken plastic fingers preventing secure attachment between lens and valve; No voltage at knob LED connector; Faulty PCB; Faulty wire harness

What actually causes this:

Broken LED housing tabs or component failure

First Thing to Check

Inspect plastic LED housing for broken tabs

Parts Involved

Plastic LED housingKnob LEDPCB main control boardWire harness

How to Fix

1
Check if plastic LED housing is installed correctly
2
Look for broken plastic fingers that prevent secure attachment
3
Measure voltage at the specific knob LED connector
4
If voltage present, LED or lens assembly is faulty
5
If no voltage, PCB or harness is faulty

This Error Applies To

Samsung DTT48T963 Series Ovens & Ranges (2022) (2022–present)

Service manual exact match: DTT48T960GS/DAService manual exact match: DTT48T963Service manual exact match: DTT36T960Service manual exact match: DTT48T960Service manual exact match: DTT36T960GS/DAService manual exact match: DTT48T963GS/DA