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

1. undefined: Check connector at Main PCB 2. undefined: Check connector at temperature sensor 3. undefined: Measure sensor resistance at room temperature (should be ~1080 ohms) 4. undefined: Verify wire continuity

Samsung Ovens & Ranges

Error Code C-20

Temperature sensor circuit is open - no resistance reading possible

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: C-20

What This Means

Temperature sensor disconnected; Sensor connector not fully inserted; Sensor wire broken; Temperature sensor failure

What actually causes this:

Loose connector, broken wire, or failed temperature sensor

First Thing to Check

Reseat temperature sensor connector at Main PCB (CN320 or CN600 pin 10)

Parts Involved

Temperature SensorMain PCBConnectors

How to Fix

1
Check connector at Main PCB
2
Check connector at temperature sensor
3
Measure sensor resistance at room temperature (should be ~1080 ohms)
4
Verify wire continuity

This Error Applies To

Samsung DOC30P977D Series Ovens & Ranges

Service manual exact match: NQ70M9770DService manual exact match: DOC30P977DService manual exact match: NQ70M7770D

Related Error Codes

H-4

Broil heating element not energizing during self-test

-dC-

Partition configuration changed during active cooking cycle

C-A2

Cooling motor not responding to control signals

C-F2

Loss of communication between main control and touch display panel

C-72

Drain system unable to evacuate water within time limit

C-F0

Loss of communication between main control board and sub control board

C-31

Main control board temperature sensor reads excessive heat

C-10

Gas sensor output voltage out of acceptable operating range

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