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

Oven heating over / Internal temperature rises abnormally high Faulty oven sensor; Defective heating element relay; Main PCB failure

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

1. undefined: Disconnect power and open back cover 2. undefined: Measure oven sensor resistance - should be 1080 Ohms at room temperature 3. undefined: Check DLB, Broil, Bake relay operation - should show infinite resistance when open 4. undefined: Check each heater resistance values 5. undefined: Verify wire harness connections to main PCB 6. undefined: If all checks fail, replace main PCB

Samsung Ovens & Ranges

Error Code C-21

Oven heating over / Internal temperature rises abnormally high

Moderate

Address soon - your appliance may not work properly

What This Means

Faulty oven sensor; Defective heating element relay; Main PCB failure

How to Fix

1
Disconnect power and open back cover
2
Measure oven sensor resistance - should be 1080 Ohms at room temperature
3
Check DLB, Broil, Bake relay operation - should show infinite resistance when open
4
Check each heater resistance values
5
Verify wire harness connections to main PCB
6
If all checks fail, replace main PCB