Error Code C-21
Oven internal overheating — oven temperature reaches 650 F (343 C) in any cooking function except self-clean
Moderate
Address soon - your appliance may not work properly
What This Means
Oven temperature sensor malfunction; DLB relay stuck on; Broil relay stuck on; Bake relay stuck on; Disconnected or damaged harness linked to Main PCB
How to Fix
- 1
Disconnect power and open back cover
- 2
Measure oven sensor resistance (normal: 1080 ohm at room temperature)
- 3
Check DLB relay, Bake relay, and Broil relay on Main PCB (normal when off: infinite ohm)
- 4
Check for damaged PCB traces or pattern
- 5
Check harness connections related to oven sensor and connector CN320 on Main PCB
- 6
If no problem found after checks, replace Main PCB
- 7
If oven sensor is faulty, replace and reconnect
- 8
Repair or replace damaged harness
Other Error Codes for DOP36M96GLS
PCB sensor opened or PCB sensor shorted (onboard NTC thermistor fault)
Main PCB to Sub PCB communication error
Short key — short circuit detected at control interface at connector CN300 on Main PCB or Sub PCB
Door locking information — door lock motor or switch malfunction
PCB sensor temperature high — onboard PCB NTC thermistor reading abnormally high temperature
Oven sensor open (over 2950 ohm) or oven sensor short (under 930 ohm)