Ariston Oven Error Code ER30

ER30 on an Ariston oven means the NTC temperature sensor located on the main control board has developed a short circuit. This sensor is responsible for monitoring temperature within the control system. Because the sensor is integrated directly into the board, the fault cannot be resolved by replacing an external probe or sensor alone. The main control board itself must be replaced.

It is not recommended to continue using the oven while ER30 is active. The short-circuited NTC sensor means the control board cannot reliably monitor temperature, which could lead to inaccurate heating or uncontrolled temperature conditions. Discontinue use until the main board has been replaced and the fault is resolved.

The cost to repair an ER30 fault will depend primarily on the price of a replacement main control board and labor if a technician is hired. Main control boards for ovens typically range from $80 to $250 or more depending on the model. Professional labor to diagnose and install the board can add $100 to $200 to the total repair cost.

The ER30 fault points directly to the main control board as the component that needs replacement. A confident DIYer with experience working on appliances can replace the main board by disconnecting power, removing the board, and installing a compatible replacement. However, working inside an oven involves electrical components and should only be attempted with the power fully disconnected at the breaker.

Resetting the oven by cutting power at the breaker and restoring it may temporarily clear the display, but the ER30 code will return because the underlying cause is a hardware failure of the NTC sensor on the main board. A reset does not repair a shorted component. Permanent resolution requires replacing the main control board.