Electrolux Range Error Code C-31

C-31 indicates that the NTC temperature sensor located on the main PCB has an open circuit. This sensor normally measures approximately 10K ohms at room temperature and is used by the control board to monitor its own operating temperature. When the circuit is open, the board can no longer get a valid reading and triggers the C-31 fault. The range will not function normally until the sensor or board is repaired or replaced.

It is not recommended to operate the range while the C-31 fault is active. The NTC sensor on the main PCB exists to protect the board from overheating, and without a valid sensor reading the control board is operating without that protection. Continued use could risk further damage to the PCB or other components. Disconnect power and arrange for a diagnosis before resuming use.

Repair costs depend on the root cause. If a solder joint reflow resolves the issue, labor costs alone may apply, typically in the range of $75 to $150 depending on the service provider. If the main PCB requires full replacement, parts and labor combined generally fall in the range of $200 to $500 or more, depending on the specific model and local labor rates. Getting a diagnostic quote before authorizing parts is advisable.

It is possible if the cause is a cracked solder joint rather than a failed sensor. After disconnecting power, removing the back cover, and taking the main PCB out of its holder, inspect the back side of the board for broken solder joints at the NTC sensor's connection points. A technician with soldering skills may be able to reflow the joint and restore continuity. However, if the sensor itself measures open or the PCB trace is damaged, board replacement is typically required.

A power reset, such as unplugging the range for a few minutes and restoring power, may temporarily clear the code from the display. However, if the NTC sensor has a true open circuit fault, the error will return once the board runs its diagnostic checks. A reset does not repair the underlying hardware problem, so professional diagnosis and repair are still required.