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

1. undefined: Disconnect power and open the back cover; disconnect sensor harness 2. undefined: Measure sensor resistance: normal is 1 kOhm at room temperature; replace if faulty 3. undefined: Check broil, bake, and convection heater resistance 4. undefined: Check whether DLB, Broil, Bake, and Convection heater relays are working normally (normal relay resistance: open/infinite when de-energized) 5. undefined: Check for disconnected harness at Main PCB 6. undefined: Measure resistance of oven sensor connector on Main PCB (normal: 2850 ohms) 7. undefined: Replace or repair harness as needed 8. undefined: Replace Main PCB if problem persists

Samsung Ovens & Ranges

Error Code C-21

Q: What does error code C-21 mean on a Samsung ovens & ranges?

Oven heating over-temperature Faulty oven temperature sensor; Faulty broil, bake, or convection heater relay (DLB, Broil, Bake, Convection); Disconnected or damaged harness connected to Main PCB; Faulty Main PCB

Oven heating over-temperature

Moderate

Address soon - your appliance may not work properly

What This Means

Faulty oven temperature sensor; Faulty broil, bake, or convection heater relay (DLB, Broil, Bake, Convection); Disconnected or damaged harness connected to Main PCB; Faulty Main PCB

How to Fix

1
Disconnect power and open the back cover; disconnect sensor harness
2
Measure sensor resistance: normal is 1 kOhm at room temperature; replace if faulty
3
Check broil, bake, and convection heater resistance
4
Check whether DLB, Broil, Bake, and Convection heater relays are working normally (normal relay resistance: open/infinite when de-energized)
5
Check for disconnected harness at Main PCB
6
Measure resistance of oven sensor connector on Main PCB (normal: 2850 ohms)
7
Replace or repair harness as needed
8
Replace Main PCB if problem persists