Error Code C-21
Temperature regulation failure causing excessive oven temperature
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: C-21
What This Means
Faulty oven sensor reading low resistance; Defective DLB relay; Defective Bake or Broil heater relay; Failed heating element not cycling off; Harness disconnection at main PCB
What actually causes this:
Stuck heating relay or sensor malfunction reporting low temperature
First Thing to Check
Measure sensor resistance and check relay continuity with multimeter
Parts Involved
How to Fix
- 1
Disconnect power and sensor harness
- 2
Measure sensor resistance: 1080 Ohms at room temperature
- 3
Check broil, bake and convection heater resistance values
- 4
Check whether DLB relay, Bake and Broil relays operate normally
- 5
Check for disconnections in harness linked to main PCB
- 6
Measure oven sensor connector resistance on main PCB (Normal: 2850 Ohms)
This Error Applies To
Samsung DOP36M94DL Series Ovens & Ranges
Related Error Codes
Temperature sensor open circuit detected
PCB internal temperature abnormally high or sensor shorted
Probe temperature sensor has short circuit
Inter-PCB communication link failure detected
Touch screen panel communication with main control board lost
Door locking mechanism failed to engage or disengage
Main PCB internal temperature sensor failed
Steam system temperature sensor open or short circuit