What does error code C-20 mean on a Samsung ovens & ranges?

Oven temperature sensor open circuit Disconnected sensor harness; Broken sensor; Poor wiring connection

How do I fix error code C-20 on a Samsung ovens & ranges?

1. undefined: Disconnect power and open back cover 2. undefined: Disconnect sensor harness from control 3. undefined: Measure sensor resistance (should be 1080 ohms at room temperature)

Samsung Ovens & Ranges2020–present

Error Code C-20

Oven temperature sensor open circuit

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: C-20

What This Means

Disconnected sensor harness; Broken sensor; Poor wiring connection

What actually causes this:

The temperature sensor wire is broken or disconnected, so the oven cannot read temperature

First Thing to Check

Check if the sensor wire connector is fully seated on the main PCB at CN320

Parts Involved

Oven sensorHarness CN320

How to Fix

1
Disconnect power and open back cover
2
Disconnect sensor harness from control
3
Measure sensor resistance (should be 1080 ohms at room temperature)

This Error Applies To

Samsung DOB30P977D Series Ovens & Ranges (2020) (2020–present)

Service manual exact match: DOB30P977DSService manual exact match: NV51M9770DS

Related Error Codes

C-21

Oven temperature control failure causing excessive heating

C-23

Temperature probe sensor short circuit detected

C-70

Steam temperature sensor open circuit detected

C-72

Drain pump failure or water sensor malfunction in steam system

C-F0

Main and sub control board communication failure

C-d0

A control button is stuck in pressed position

C-A2

Cooling fan motor failure

C-30

PCB internal temperature sensor open circuit

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