Samsung Range Error Code C-31

C-31 is a temperature fault code indicating that the oven did not reach the expected temperature during Bake mode, or that it exceeded the upper temperature limit during Broil mode. The error is rooted in the oven temperature sensing circuit, which includes the sensor itself, the connecting wiring harness, and the control board. Samsung ranges display this code to prevent unsafe operation when temperature control cannot be confirmed.

It is not recommended to continue using the oven while C-31 is active. The code indicates that temperature control is unreliable, meaning the oven could fail to heat properly or could overheat without the control system detecting it. Continuing to operate the oven in this condition creates a potential fire or food safety hazard. Resolve the fault before resuming normal use.

If the oven temperature sensor is the cause, replacement sensor parts typically range from $20 to $60 depending on the model, and the repair is often manageable without a service call. If a wiring harness needs replacement, costs are similar. A control board replacement is the most expensive scenario, with parts generally ranging from $150 to $350 or more, plus labor if a technician is hired. Getting a diagnosis before ordering parts helps avoid unnecessary expenses.

A knowledgeable DIYer can perform the initial diagnostic by disconnecting power, removing the rear cover, and measuring the resistance of the oven temperature sensor. If the sensor reads outside the normal range, replacing it is a straightforward repair that does not require specialized tools. However, if the control board is at fault, that repair is more involved and some technicians prefer professional service for board replacement.

Disconnecting power briefly may temporarily clear the C-31 display, but the code will return if the underlying fault has not been corrected. The control board monitors oven temperature continuously during operation, so any persistent sensor or wiring problem will trigger the code again during the next cook cycle. A reset is useful for confirming whether the fault is intermittent, but it is not a permanent fix.