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Error code reference
Samsung Oven Error Code C-21
The internal temperature rises abnormally high, or oven sensor is shorted when the oven is operating.
SourceSamsung Combi Wall Oven - Full Service Manual: NQ70M6650D / NQ70R5511Dp. 45
Diagnostic procedure
The full C-21 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Disconnect power. Disconnect sensor harness from sensor. Measure sensor resistance: 1080 ohms at room temperature.
SourceSamsung Combi Wall Oven - Full Service Manual: NQ70M6650D / NQ70R5511Dp. 45
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
8 manuals in the MyPros+ library document this code for Samsung oven.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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