Error Code C-21
Oven sensor is short when operating or internal temperature rises abnormally high
Moderate
Address soon - your appliance may not work properly
What This Means
Oven sensor short circuit; Temperature rises abnormally high; Defective DLB, broil, bake or convection relay; Disconnected wire harness on Main PCB; Defective heater element
How to Fix
- 1
Disconnect power and open back cover
- 2
Disconnect sensor harness from sensor
- 3
Measure sensor resistance at room temperature
- 4
Check the resistance of broil, bake and convection heater
- 5
Check whether DLB, broil, bake and convection relays are working normally
- 6
Check whether any part of wire harness is disconnected
- 7
Replace oven sensor if found defective
- 8
Replace main PCB if pattern is damaged or parts are incorrectly contacted
This Error Applies To
Samsung NE58H9970W Series Ovens & Ranges (2019) (2019–present)
Related Error Codes
Communication between Main and Sub PCB is interrupted
Key short or keypad cable issue
Communication between Main and Touch PCB is interrupted
PCB temperature sensor is short or PCB temperature rises abnormally high
Door lock is mispositioned or door lock switch/motor issue
PCB temperature sensor is open when oven is operating
Communication between Display PCB and Inverter Module PCB is interrupted
Oven sensor is open or sensor has high resistance when oven is operating