How do I fix error code C-21 on a Samsung ovens & ranges?

1. undefined: Disconnect power and measure sensor resistance (should be 1080 Ω at room temperature) 2. undefined: Check resistance of broil, bake, and convection heaters 3. undefined: Check whether DLB, broil, bake, and convection relays are working normally 4. undefined: Check if any wire harness on Main PCB is disconnected 5. undefined: Measure resistance of oven sensor connector (Normal: 2850 Ω) 6. undefined: Unit will display 'C-21' after beeping 10 times if temperature exceeds specified level

Samsung Ovens & Ranges

Error Code C-21

Oven temperature rises abnormally high; Oven sensor is short when oven is operating

Moderate

Address soon - your appliance may not work properly

What This Means

Oven sensor resistance incorrect; Broil, bake, or convection heater problem; DLB relay malfunction; Wire harness disconnected on Main PCB

How to Fix

1
Disconnect power and measure sensor resistance (should be 1080 Ω at room temperature)
2
Check resistance of broil, bake, and convection heaters
3
Check whether DLB, broil, bake, and convection relays are working normally
4
Check if any wire harness on Main PCB is disconnected
5
Measure resistance of oven sensor connector (Normal: 2850 Ω)
6
Unit will display 'C-21' after beeping 10 times if temperature exceeds specified level

This Error Applies To

Samsung NQ70M6650D Series Ovens & Ranges

Service manual exact match: NQ70R5511DGService manual exact match: NQ70M7770DService manual exact match: NQ70M7770DGService manual exact match: NQ70M6650DSService manual exact match: NQ70T5511D