Error Code C-21
The internal temperature rises abnormally high.
Moderate
Address soon - your appliance may not work properly
What This Means
Defective oven sensor thermistor; Short in heater relay circuit; Damaged PCB pattern; Main PCB malfunction
How to Fix
- 1
Disconnect power and remove display PCB
- 2
Replace main PCB
- 3
Reconnect oven sensor after replacement
- 4
Check DLB, Bake, and Broil relays (should show infinity ohms when open)
- 5
Inspect for damaged PCB patterns
- 6
Measure oven sensor resistance (should be 1 kΩ at room temperature)
- 7
Check harness connections related to oven sensor
- 8
Verify connector and harness at CNS600 on main PCB are properly seated
Other Error Codes for NE63T8751SS
There is a short in the control key.
The door lock is misaligned.
Communication between Main and Touch is interrupted.
The sub PCB temperature rises abnormally high.
The oven sensor is open when the oven is operating. There is a short in the oven sensor.
Communication between Main and Sub PCB is interrupted.
The PCB temperature rises abnormally high.
This code appears if the divider is inserted or removed while the oven is operating.