Samsung Ovens & Ranges2017–present

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

Main PCBHeat sinkTemperature monitoring circuit

How to Fix

  1. 1

    Check ambient temperature around oven

  2. 2

    Monitor PCB thermal conditions

  3. 3

    Verify heat sink integrity

This Error Applies To

Samsung DOC30M977D Series Ovens & Ranges (2017) (2017–present)

Service manual exact match: NQ70M7770DGService manual exact match: DOC30M977DS

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