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Samsung Oven Error Code C-24 (Temperature Rising Too Fast)

C-24 means the oven’s temperature sensor caught the temperature climbing faster than normal, almost always because the vent at the back of the cooktop is blocked.

Risk: Moderate

Meaning

C-24 means Samsung’s temperature sensor caught the oven heating up faster than its normal rate, and Samsung ties this almost entirely to the vent at the back of the cooktop being blocked. Clearing whatever’s covering that vent, usually a pan set down nearby, is the fix in most cases. Opening and closing the door a few times while the oven is still running can help release trapped heat through the vent if the code won’t clear on its own.

The information provided here is a diagnostic aid and does not replace the intervention of a qualified professional.

Possible causes

No cause is certain until it has been checked on the appliance.

Very likely Vent at the back of the cooktop blocked by a pan, foil, or other object
Likely Vent partially restricted by built-up grease or debris
Possible Temperature sensor reading incorrectly

Tools needed

Flashlight
Degreaser
Cloth

First checks

Check the vent area at the back of the cooktop and remove anything covering it, including pans set down nearby.
While the oven is still cooking, open and close the door a few times, holding each open for about 3 seconds, to help release trapped warm air through the vent.
If the code won't clear, turn off the oven and leave the door open for a minute to let it cool down before trying again.

Step-by-step diagnosis

Clear the vent at the back of the cooktop. Pans, trivets, foil, and anything resting there all count.
Look into the vent slot with a flashlight. Baked-on grease narrows the opening without ever looking blocked.
Degrease the slot and the surface around it once the cooktop is cool.
If the code appears while you are cooking, open the door for about three seconds and close it again, a few times over, to release the trapped heat.
Check what is inside the oven too. A full sheet pan on the top rack, or foil laid across a rack, blocks the same airflow the vent depends on. Never line the oven floor with foil.
Run a short bake with the vent clear and watch whether preheat behaves normally.

What not to do

Covering the back vent with cookware or trivets while the oven is on. That's the single most common cause Samsung documents for this code.
Ignoring a recurring C-24 as just a glitch. If it keeps happening with a clear vent, the temperature sensor itself may need to be checked.

When to stop

C-24 returns with a clear, clean vent and nothing blocking the racks. The temperature sensor is the next suspect, and it is not a part to swap on a hunch.
The oven noticeably overshoots the temperature you set.

An error code varies by brand

The same code can have a different meaning depending on the brand and model. Always check your appliance's manual before acting.

Related guides

When to call a professional

If the simple checks turned up nothing, if the repair involves electricity, gas, or the sealed refrigerant system, or if you have any doubt at all: stop there and hand the appliance over to a qualified technician.