Error code reference

Samsung Range Error Code C-21

Oven overheating or safety error: temperature does not reach 600°F (315°F) in Bake mode or 550°F in Broil mode, or oven temperature reaches 650°F (343°C) in any cooking function except self-clean.

SourceSamsung NX58K3310 Gas Range - Service Manualp. 37, 40-41

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. Measure oven sensor resistance (1080 ohms at room temperature). Check broil and bake burners for proper lighting and operation. Check DLB, Broil & Bake Ignitor operation. Verify all harness connections to PCB.

SourceSamsung NX58K3310 Gas Range - Service Manualp. 37, 40-41

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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