Error Code C-21

Oven temperature rises abnormally high or sensor is short

What This Means

Oven sensor resistance incorrect (should be 1080 Ohms at room temperature); Broil, bake, or convection heater resistance abnormal; DLB, broil, bake, or convection relays not working normally; Wire harness on Main PCB disconnected; Oven sensor connector resistance incorrect (should be 2850 Ohms); PCB temperature sensor abnormality

How to Fix

1. 1

   Disconnect power and open back cover

2. 2

   Disconnect sensor harness from sensor

3. 3

   Measure sensor resistance: 1080 Ohms at room temperature. If incorrect, replace oven sensor

4. 4

   Check the resistance of broil, bake and convection heater

5. 5

   Check whether DLB, broil, bake and convection relays on Main PCB are working normally

6. 6

   Check whether any part of a wire harness on Main PCB is disconnected

7. 7

   Check the resistance of oven sensor connector on main PCB (Normal: 2850 Ohms)

8. 8

   Unit will display C-21 after beeping 10 times if temperature is higher than specified during operation

9. 9

   Replace main PCB if relays are damaged or shorted

This Error Applies To

Samsung NE58F9500S Series Ovens & Ranges (2018) (2018–present)