Ariston Cooktop Error Code E.35

E.35 means the control board has detected an open circuit condition on the temperature sensor for the FRR cooking zone. An open circuit means the sensor is not sending any signal back to the board, which could be due to a broken sensor, a disconnected wire, or damaged wiring. The cooktop will typically disable that zone until the fault is resolved.

No, you should not continue using the affected cooking zone while E.35 is active. The error indicates the control board cannot monitor the zone temperature, which means it cannot regulate power safely or prevent overheating. Other zones not affected by the fault may still function, but the FRR zone should remain unused until the fault is corrected.

Repair costs vary depending on what component has failed. A replacement temperature sensor typically runs in the range of $20 to $60 for the part, while a new main control board can cost $80 to $200 or more depending on the model. Adding labor from a qualified technician generally brings the total repair cost to somewhere between $100 and $350, depending on the diagnosis and local service rates.

Some causes of E.35 can be addressed by a confident DIYer, such as reseating a loose harness connector. However, replacing the temperature sensor or control board requires disassembling the cooktop and working near electrical components, so a qualified appliance technician is recommended if you are not comfortable with that level of repair. Always disconnect power before inspecting internal components.

A power reset by switching off the cooktop at the breaker for a few minutes may temporarily clear the error display, but it will not fix the underlying open circuit condition. If the sensor or wiring is physically broken or disconnected, the error will return as soon as the cooktop attempts to read the sensor again. A reset is useful for confirming whether the fault is persistent, but it is not a repair.