Ariston Cooktop Error Code E.30

E.30 on an Ariston cooktop means the temperature sensor for the REL cooking zone has been detected in a short circuit condition. The control board is reading near-zero resistance from the sensor, which is outside the normal operating range. As a result, the affected cooking zone is disabled to protect the unit. The fault requires inspection and testing of the sensor and its associated wiring.

The affected cooking zone will typically be disabled when E.30 is active, making it non-functional. You should not attempt to bypass this safety lockout. If other zones are still operational, they may continue to work, but it is advisable to have the fault repaired promptly to avoid any risk of the issue spreading to the control board or other components.

Repair costs vary depending on what has failed. A replacement cooking zone temperature sensor typically ranges from $20 to $80 for the part, while a control board replacement can run $100 to $250 or more. Adding professional labor, total repair costs generally fall between $100 and $350 depending on your location and the specific parts required.

A confident DIYer with a multimeter can perform basic diagnostics such as inspecting wiring and measuring sensor resistance. However, replacing the temperature sensor or control board involves disassembling the cooktop and working near electrical components, which carries risk if not done carefully. If you are not comfortable with appliance electrical work, it is best to call a qualified technician.

A power reset may temporarily clear the error display, but if the temperature sensor or its wiring remains in a short circuit condition, the E.30 fault will return as soon as the cooktop runs its diagnostic checks. A reset alone does not resolve the underlying hardware fault and the sensor or wiring must be inspected and repaired.