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Error code reference
Samsung Oven Error Code C-23
Internal temperature rises abnormally high during oven operation.
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What the C-23 error code actually means
The C-23 code means your Samsung oven detected that the inside temperature got dangerously higher than it should be during cooking. This could be caused by a faulty temperature sensor, a heating element that won't turn off, or an issue with the control board. Stop using the oven until the problem is diagnosed and repaired to avoid a potential safety hazard.
Diagnostic procedure
The full C-23 procedure
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1
First diagnostic step
Disconnect power. Disconnect sensor harness from sensor. Measure sensor resistance at room temperature. If there are any problems, replace oven sensor. Check the resistance of broil, bake, and convection heater. Check whether DLB, broil, bake, and convection relays on the Main PCB are working normally. Check whether any part of a wire harness on Main PCB is disconnected. Check the resistance of oven sensor connector on main PCB (Normal). Follow diagnostics steps on dedicated page.
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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Most common causes of C-23
Ranked by how often they cause this code
- 1Faulty oven temperature sensor
- 2Stuck or welded relay on main PCB
- 3Shorted heating element
- 4Disconnected or damaged sensor wire harness
- 5Main PCB failure
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Questions people ask about C-23
What does C-23 mean on a Samsung oven?
C-23 means the oven detected an abnormally high internal temperature during operation. The oven's temperature sensor continuously feeds data to the main control board, and this code appears when the cavity temperature climbs beyond the acceptable range. The cause can be a faulty sensor, a stuck heating relay, a shorted element, or a wiring issue. The oven should not be used until the problem is identified and repaired.
Is it safe to use my Samsung oven while it shows C-23?
No, you should stop using the oven when C-23 is active. This code indicates the oven interior is reaching dangerously high temperatures, which can damage internal components and create a fire or burn hazard. Do not attempt to cook with the appliance until the cause has been diagnosed and the faulty component has been repaired or replaced.
How much does it cost to repair a Samsung oven showing C-23?
Repair costs vary depending on which component has failed. An oven temperature sensor typically costs between $20 and $60 for the part, while a bake or broil element may range from $30 to $100. Main PCB replacement is the most expensive scenario, often ranging from $150 to $350 or more for the part alone. Adding professional labor costs, a complete repair can range from around $100 on the low end to over $400 for a board replacement.
Will resetting the oven clear the C-23 error code?
Disconnecting power for a few minutes may temporarily clear the C-23 code, but if the underlying fault still exists the error will return once the oven reaches abnormal temperatures again. A reset does not fix the root cause. Proper diagnosis of the sensor, heaters, relays, and wiring is required before the oven can be safely operated.
How do I fix the C-23 error on a Samsung oven?
Begin by disconnecting power and removing the sensor harness, then measure the oven sensor's resistance at room temperature to determine if the sensor is defective. If the sensor tests correctly, check the resistance of the broil, bake, and convection heaters. Next, inspect the DLB, broil, bake, and convection relays on the main PCB to confirm they are switching properly, and check all wire harness connections on the board. Replace any component that tests outside the normal range.
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