Error Code C-21
Internal temperature rises abnormally high - Oven sensor short circuit or thermal runaway
Moderate
Address soon - your appliance may not work properly
What This Means
Temperature sensor short or defective; Broil, bake, or convection heater stuck on; Relay malfunction; Wire harness disconnected; Sensor connector resistance incorrect
How to Fix
- 1
Disconnect power and sensor harness. Measure sensor resistance (Normal: 1080 Ohms at room temperature)
- 2
Check resistance of broil, bake, and convection heaters
- 3
Check DLB, broil, bake, and convection relays on Main PCB
- 4
Check wire harness on Main PCB for disconnection
- 5
Measure oven sensor connector resistance on Main PCB (Normal: 2850 Ohms)
- 6
Unit beeps 10 times and displays C-21 if temperature exceeds specification
This Error Applies To
Samsung NV51K7770D Series Ovens & Ranges
Related Error Codes
Communication interrupted between Main and Sub PCB
Oven sensor open circuit when operating
Temp probe sensor is shorted when oven is operating
PCB temp sensor is open when oven is operating
PCB temperature rises abnormally high
Partition inserted or removed while oven is operating
Steam sensor open when steam mode is on
Drain system problem - Water level sensor detects water remaining after max draining time