Samsung Oven C-24 Error Code — What It Means
The C-24 code on a Samsung oven or range signals that the temperature sensor has detected the oven cavity is rising hotter than the normal rate. This is an over-temperature condition, not necessarily a sensor failure. Samsung’s service guidance identifies a blocked or partially blocked vent at the back of the cooktop as the most common cause. When the vent is obstructed, hot air cannot escape properly and the cavity temperature climbs faster than expected, triggering the fault.
The error often clears once the airflow is restored and the oven has a chance to cool. If the code persists after removing obstructions and performing a power reset, the issue may involve the sensor circuit, wiring connections, or the main control board.
Common Causes
- Blocked rear vent Pans, foil, or other items covering the vent at the back of the cooktop trap heat and prevent proper airflow, causing rapid temperature rise.
- Restricted airflow path Dust, grease buildup, or debris inside the vent channel slows exhaust and allows heat to accumulate faster than normal.
- Control board glitch A temporary fault in the main control can misread sensor data or fail to account for normal heat curves during preheat.
- Temperature sensor drift or fault If the thermistor is reading high or responding too quickly, the control will see an abnormal rate of rise even with clear airflow.
- Loose or corroded sensor connector Poor contact at the sensor plug can introduce noise or intermittent high readings that mimic a runaway temperature condition.
- Outdated firmware On SmartThings-enabled models, older control software may have logic errors that trigger false over-temp faults during certain cycles.
Step-by-Step Fix
- Check the rear vent at the back of the cooktop for any pans, foil, or other objects blocking the opening, and remove them immediately.
- Open the oven door and leave it open for about one minute to allow trapped heat to escape and the cavity to cool naturally.
- Turn off the oven at the control panel, wait thirty seconds, then turn it back on to see if the code clears after the brief cool-down.
- Perform a power reset by switching off the breaker or unplugging the range for two minutes, then restoring power to clear any temporary control fault.
- Connect to SmartThings (if your model supports it), restart the range from the app, and allow any available firmware update to complete—Samsung lists version DE92-04769A_24052400 or later.
- Inspect the sensor wiring behind the rear wall of the oven cavity for loose connectors, visible damage, or corrosion at the plug.
- Schedule service if the C-24 code returns after clearing the vent, resetting power, and updating firmware—a technician will test the sensor circuit and control board inputs.
Parts Often Needed
| Part | Notes |
|---|---|
| Oven temperature sensor (thermistor) | Amazon | Factory sensor for your exact Samsung model—consult the service manual or model plate for the correct part number. |
| Sensor wire harness | Amazon | Replacement connector and cable assembly if the plug or wiring shows heat damage or corrosion. |
| Main control board (PCB) | Amazon | Required only if the sensor and wiring test good but the over-temp fault persists—verify the board part number before ordering. |
When to Call a Pro
Call a qualified appliance technician if the C-24 code returns after you have cleared the vent, reset power, and updated firmware on a SmartThings model. Persistent codes usually mean the sensor circuit, connectors, or main control board need diagnostic testing with a multimeter and comparison to factory resistance tables. A technician will measure the sensor at room temperature and during a controlled heat cycle, check for proper continuity and grounding, and determine whether the thermistor or the control board is at fault. Because the sensor is often located behind the rear oven wall and the control board may require live voltage work, professional service is the safest path when simple resets do not resolve the issue.