Error Code C-31
Control board temperature exceeds safe limit
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: C-31
What This Means
Excessive ambient temperature; Defective temperature monitoring circuit; Short circuit in control board
What actually causes this:
Poor ventilation, blocked air vents, or defective temperature sensor on PCB
First Thing to Check
Verify oven has adequate ventilation around control board area
Parts Involved
How to Fix
- 1
Check ambient temperature around oven
- 2
Monitor PCB thermal conditions
- 3
Verify heat sink integrity
Other Error Codes for NQ70M7770DG
PCB internal temperature sensor malfunction
Water not draining from oven cavity after cycle completion
Shorted keypad keys detected
Loss of communication between control boards
Temperature probe sensor short circuit detected
Magnetron or convection cooling fan not operating correctly
Temperature sensor open circuit or short detected during operation
Door lock mechanism positioned incorrectly or not functioning