Samsung Oven Error Code C-31

C-31 is a safety error code that appears when the NTC temperature sensor detects an extremely hot condition inside the oven that lasts for more than 10 seconds. The oven shuts down automatically to prevent damage or a safety hazard. The fault can stem from a defective NTC sensor, a failed heater relay, or wiring issues between the sensor and control board. Power must be disconnected before performing any inspection.

No, you should not attempt to operate the oven while C-31 is active. The code indicates either a genuine overtemperature condition caused by a stuck relay, or a sensor fault that prevents the oven from regulating heat properly. Either situation poses a potential fire or damage risk. Keep the oven off and unplugged until the fault is diagnosed and repaired.

Disconnecting power to the oven for several minutes may temporarily clear the C-31 code, but the error will return if the underlying fault has not been corrected. Because C-31 is a safety lockout triggered by a sustained thermal event, simply resetting the unit without repairing the NTC sensor or heater relay will not resolve the problem. A proper diagnosis of both the sensor and relay should be completed before returning the oven to service.

Some aspects of diagnosing C-31 are accessible to a confident DIYer, such as inspecting the NTC sensor for visible damage or checking solder connections after safely disconnecting power. However, testing relay resistance and replacing components like the heater relay or control board typically requires basic electrical knowledge and a multimeter. If you are not comfortable working with appliance wiring, a qualified technician is recommended.

Repair costs vary depending on which component has failed. An NTC sensor replacement is typically the least expensive fix, with parts generally ranging from $15 to $50 and labor adding $75 to $150 if a technician is used. A heater relay or control board replacement will cost more, potentially ranging from $150 to $400 or higher depending on parts and local labor rates. Getting a diagnosis first helps narrow down the exact component before committing to a repair cost.