Samsung Ovens & Ranges2020–present
Error Code C-21
Internal Oven Temperature Abnormal Error
Moderate
Address soon - your appliance may not work properly
What This Means
Temperature sensor disconnected; Temperature sensor malfunction; Heater drive failure; Heater relay not operating; PCB software error
How to Fix
- 1
Turn oven off and let it cool sufficiently
- 2
Check if internal oven temperature reached over 350 degrees
- 3
Verify temperature sensor connectivity
- 4
Reconnect temperature sensor if loose
- 5
Check heater drive part and repair if necessary
- 6
Check relay terminal voltage (230V)
- 7
Power cycle oven and test
- 8
Replace PCB if problem persists
This Error Applies To
Samsung NV75N7546R Series Ovens & Ranges (2020) (2020–present)
Service manual exact match: NV31T4551SS/AAService manual exact match: NV75N7546RBService manual exact match: NV75N7646RBService manual exact match: NV75N7646RSService manual exact match: NV75N7546RSService manual exact match: NV31T4551SSService manual exact match: NV75N7626RB