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Samsung Ovens & Ranges2017–present

Error Code C-20

Oven temperature sensor circuit is open

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: C-20

What This Means

Oven sensor connector loose or disconnected at main PCB; Oven sensor connector loose or disconnected at sensor; Damaged or broken temperature sensor; Main PCB failure

What actually causes this:

Temperature sensor wire broken, connector loose, or sensor failed preventing temperature feedback

First Thing to Check

Check oven sensor connector at main PCB (CN320) is fully inserted

Parts Involved

Oven SensorTemperature Sensor ConnectorMain PCBCN320 Connector

How to Fix

  1. 1

    Disconnect power

  2. 2

    Check connector at main PCB is inserted

  3. 3

    Check connector at sensor is inserted

  4. 4

    Measure sensor resistance at room temperature

  5. 5

    Normal resistance should be 1080 Ohms at room temperature

This Error Applies To

Samsung DOB30M977 Series Ovens & Ranges (2017) (2017–present)

Service manual exact match: DOB30M977DService manual exact match: DOB30M977S

Related Error Codes

C-F2

Touch panel control communication failure

C-30

PCB temperature sensor open or short circuit

C-A2

Cooling fan motor malfunction

C-31

PCB overheating - internal temperature critically high

C-21

Oven overheating - internal temperature critically high

C-23

Meat probe sensor short circuit detected

C-72

Steam drain system not working - water remains after cycle

C-d1

Door lock mispositioned or malfunctioning

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