SAMSUNG SAMSUNG OVEN/RANGE (C-21 ERROR CODE) Sensor Error
| CONF | DIAGNOSIS | ACTION |
|---|---|---|
|
85%
CONF
|
Main Power Control Board
The C-21 code indicates an actual or perceived overheat condition. The most frequent mechanical cause is a stuck or 'welded' L1 relay on the main control board which continues to provide line voltage to the heating elements even after the thermostat reaches the set point. Replacing the board restores the logic-controlled switching of the heating circuit.
SKU: DG92-01207B
|
VIEW ON AMAZON
#CommissionsEarned
|
|
10%
CONF
|
Oven Temperature Sensor
This thermistor measures the internal cavity temperature via resistance changes. If the sensor has failed or drifted (out of calibration), it may send an incorrect voltage signal to the control board, triggering a false C-21 high-temperature lockout even if the oven is not physically overheating.
SKU: DG32-00002B
|
VIEW ON AMAZON
#CommissionsEarned
|
|
5%
CONF
|
User Interface Sub-PCB
In certain Samsung architectures, the communication between the display/touch assembly and the power relay board can break down. If the signal to cease heating is never successfully processed or transmitted by the UI board, the oven will continue to heat until the safety limit is reached and the C-21 code is thrown.
SKU: DG94-03575A
|
VIEW ON AMAZON
#CommissionsEarned
|
DIY Repair Guide
Watch exactly how to replace the Main Power Control Board.
// NOTICE:
This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.
PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.