Error Code C-21
Oven sensor short circuit or internal temperature abnormally high
Moderate
Address soon - your appliance may not work properly
What This Means
Oven sensor short; Main PCB relay failure (DLB, Bake, Broil, Convection relay); Damaged PCB pattern or components; Harness short to ground
How to Fix
- 1
Disconnect power and assy display PCB
- 2
Check DLB, Bake, and Broil relay (normal infinity ohms)
- 3
Measure oven sensor resistance (1080 ohms at room temperature)
- 4
Inspect main PCB for damaged patterns
- 5
Verify harness connections for shorts
- 6
Replace main PCB or oven sensor as needed
This Error Applies To
Samsung NE63T8511SS Series Ovens & Ranges (2022) (2022–present)
Related Error Codes
Oven sensor open circuit during operation
Short in the control key
Door lock misaligned or malfunction
Communication failure between Main and Sub PCB
Sub PCB temperature sensor open circuit or short
Main PCB temperature sensor open or short circuit
Main PCB temperature abnormally high
Sub PCB temperature abnormally high