Samsung C-23 Error Code | Fast & Reliable Repair

Error Code Explained

What Does the Samsung C-23 Error Code Mean?

The C-23 error code on a Samsung oven or range indicates a fault in a third temperature sensor circuit — typically the cooling fan area sensor or an auxiliary cavity sensor used on specific double-oven and slide-in range models. The control board monitors this sensor to track temperatures in the control electronics compartment or a secondary zone. C-23 triggers when the sensor returns an open or out-of-range resistance reading.

On models where C-23 monitors the cooling fan sensor, the error may also appear if the cooling fan itself has seized or failed — causing the electronics bay to overheat and trigger the thermal protection circuit. The oven will halt operation to prevent control board heat damage.

Root Causes

Common Causes of the Samsung C-23 Error Code

1

Failed Auxiliary Temperature Sensor

The third sensor circuit — whether monitoring the cooling area, broil zone, or secondary cavity — has developed an open or short circuit. Testing with a multimeter confirms sensor resistance out of the expected 1,080–1,090 ohm range at room temperature.
2

Seized or Failed Cooling Fan

The cooling fan that circulates air over the control board electronics has seized due to a failed bearing or motor. Without airflow, the electronics bay overheats and the thermal sensor triggers C-23 as a protection measure.
3

Sensor Wiring Fault

A broken, pinched, or shorted wire in the sensor harness creates an invalid resistance reading at the control board. Wiring faults in the electronics bay area can also occur from heat exposure over time.
4

Main Control Board Fault

If the sensor and wiring test correctly, the control board's input circuit for this sensor channel may have failed, generating a false C-23 code.

Step-by-Step Guide

How to Troubleshoot the C-23 Error Code

⚠️

Safety First: Always disconnect the Oven/Range from power before inspecting any internal components. Do not attempt electrical repairs. If in doubt, call a certified technician.

1

Identify the sensor location for your model

Check your specific Samsung range model number against the service manual. C-23 sensor location varies by model — it may be in the upper rear of the oven cavity, in the electronics compartment above the oven, or along the cooling duct. The model-specific wiring diagram (inside the back access panel) identifies the exact sensor.
2

Check the cooling fan operation

With the oven running, listen and feel for airflow from the cooling vents (typically at the rear top of the range). No airflow indicates the cooling fan has stopped. A failed cooling fan is a straightforward replacement — access it from the rear panel.
3

Test the sensor resistance

Disconnect the suspect sensor connector and test resistance with a multimeter. The expected reading at room temperature is approximately 1,080–1,090 ohms for Samsung RTD sensors. Replace the sensor if the reading is outside this range.

Professional Service

When to Call a Samsung Technician

⚠ Stop DIY if any of these apply

C-23 involving the control electronics cooling circuit can lead to control board heat damage if the fan has failed and the oven continues to run. Call a certified technician promptly if the cooling fan is the suspected cause, or if C-23 persists after sensor replacement.

Estimated Repair Cost

$100 – $340

Exact quote before any work begins. No surprises.

📞 844-739-1647

FAQ

Frequently Asked Questions — Samsung C-23

On double-oven Samsung ranges, C-23 typically refers to an auxiliary sensor in the lower oven zone or the shared electronics compartment between the two cavities. Identify your exact sensor location using the wiring diagram on the back panel of your specific model.
You can attempt a reset by unplugging the range for 5 minutes. If C-23 returns immediately on power-up, the sensor or cooling fan requires physical inspection and replacement — the fault is not transient.
Yes — C-21, C-22, and C-23 are sequential sensor fault codes on Samsung ranges. C-21 = upper oven sensor, C-22 = lower oven sensor, C-23 = third sensor circuit (cooling fan area or auxiliary zone). All three use the same RTD sensor type and share the same diagnostic process.

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