How do I fix error code E-21 on a Samsung ovens & ranges?

1. undefined: Check whether connector (CN201) of main PCB has been inserted 2. undefined: Check whether connector (CN02) of sub PCB has been inserted 3. undefined: Measure oven sensor resistance - should be ~1000Ω at room temperature 4. undefined: Check connector seating on both main and sub PCBs

Samsung Ovens & Ranges2013–present

Error Code E-21

Q: What does error code E-21 mean on a Samsung ovens & ranges?

Temperature sensor circuit is broken open Sensor harness disconnected; Sensor connector not properly inserted (CN201 main PCB or CN02 sub PCB); Oven sensor failure - internal open circuit; Damaged sensor harness or terminal

Temperature sensor circuit is broken open

Moderate

Address soon - your appliance may not work properly

Also displayed as: E-21

What This Means

Sensor harness disconnected; Sensor connector not properly inserted (CN201 main PCB or CN02 sub PCB); Oven sensor failure - internal open circuit; Damaged sensor harness or terminal

What actually causes this:

Sensor failure or harness disconnection/damage

First Thing to Check

Measure sensor resistance at room temperature - should be 1000 ohms

Parts Involved

Sensor-ThermistorMain PCB CN201 connectorSub PCB CN02 connectorSensor harness

How to Fix

1
Check whether connector (CN201) of main PCB has been inserted
2
Check whether connector (CN02) of sub PCB has been inserted
3
Measure oven sensor resistance - should be ~1000Ω at room temperature
4
Check connector seating on both main and sub PCBs

This Error Applies To

Samsung NE58F9710W Series Ovens & Ranges (2013) (2013–present)

Service manual exact match: NE58K9500SGService manual exact match: NE58F9710WSService manual exact match: FER710DRSService manual exact match: NE58F9710WS/AA