Error Code C-21
Internal temperature rises abnormally high — safety error
Moderate
Address soon - your appliance may not work properly
What This Means
Oven sensor resistance out of spec; DLB/Broil/Bake/Convection relays on Main PCB not working normally; Wire harness on Main PCB disconnected; Oven sensor connector resistance abnormal
How to Fix
- 1
Disconnect power, open back cover, disconnect sensor harness from sensor
- 2
Measure sensor resistance at room temperature — spec value approximately 1100 ohms
- 3
Replace oven sensor if out of spec
- 4
Check resistance of broil, bake, and convection heater
- 5
Check whether DLB broil, bake, and convection relays on Main PCB are working normally
- 6
Check whether any part of wire harness on Main PCB is disconnected
- 7
Unit will display C-21 after beeping 3 times if temperature is higher than spec during operation
This Error Applies To
Samsung NE Series Ovens & Ranges
Related Error Codes
Oven sensor is open when the oven is operating
Communication between Main PCB and Touch PCB is interrupted
Communication between Main PCB and Sub PCB is interrupted
Key short circuit — keypad short detected on Sub PCB
PCB temp sensor is short when oven is operating
Door lock is mispositioned — door lock motor or switch fault during self-clean
PCB temperature rises abnormally high
PCB temp sensor is open when oven is operating