What does error code C-31 mean on a Samsung NQ70M9770D?

Main control board temperature sensor reads excessive heat Excessive ambient temperature; Cooling fan failure; PCB internal short circuit

How do I fix error code C-31 on my Samsung NQ70M9770D?

1. undefined: Check cooling fan operation 2. undefined: Verify cooling air path is not obstructed 3. undefined: Check for visible PCB damage or shorts

Samsung NQ70M9770DOvens & Range

Error Code C-31

Main control board temperature sensor reads excessive heat

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: C-31

What This Means

Excessive ambient temperature; Cooling fan failure; PCB internal short circuit

What actually causes this:

Cooling fan malfunction, ambient heat, or internal PCB short

First Thing to Check

Verify cooling fan motor spins freely and cooling vents are clear

Parts Involved

Cooling FanMain PCB

How to Fix

1
Check cooling fan operation
2
Verify cooling air path is not obstructed
3
Check for visible PCB damage or shorts

Other Error Codes for NQ70M9770D

C-30

Temperature sensor internal to Main PCB is not functioning

C-d0

Keypad short circuit detected

C-21

Temperature sensor reading exceeds safe operating threshold

C-d1

Door lock mechanism malfunction or misalignment

C-23

Meat probe sensor circuit shows abnormally low resistance

H-3

Bake heating element not energizing during self-test

-dC-

Partition configuration changed during active cooking cycle

H-4

Broil heating element not energizing during self-test

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