Ariston Cooktop Error Code E.27

E.27 indicates that the dissipator temperature sensor on the Communicating Generator has been detected in an open circuit condition. This means the control board is receiving no signal from the sensor that monitors heat sink temperature on the induction generator. The cooktop shuts down as a safety precaution because it cannot verify that the electronics are operating within safe thermal limits.

No, the cooktop should not be used while E.27 is active. The error indicates the control board cannot monitor the temperature of a critical electronic component. Without that thermal feedback, continued operation could result in damage to the induction generator electronics or create a safety hazard.

Repair costs depend on the root cause. Replacing a failed NTC temperature sensor is generally the least expensive fix, typically in the range of $50 to $150 including parts and labor. If the main control board has failed and requires replacement, costs can rise to $200 to $400 or more depending on parts availability and labor rates in your area.

A knowledgeable DIYer can inspect visible wiring and connectors for obvious disconnections or damage, but accessing the internal components of an induction cooktop requires disassembly and comfort working around high-voltage electronics. If the sensor or control board requires replacement, a qualified appliance technician is strongly recommended due to the risk involved with induction generator components.

A power reset by unplugging the unit or switching off the circuit breaker may temporarily clear the fault display, but E.27 will return if the underlying open circuit condition in the sensor wiring or the sensor itself has not been repaired. A reset does not fix the hardware fault causing the error.