Access our premium database of error codes, common faults, and professional repair solutions for Ariston appliances.
Ariston F11: Motor drive or inverter rotation anomaly in Dishwasher; drum/motor fails to spin at target RPM.
The main circulation (wash) pump is not working correctly. This could be a seized pump, a faulty capacitor, or a wiring issue.
Check for any obstructions in the wash pump. Test the motor windings and the start capacitor. Check wiring to the pump.
Ariston F12: Operational cycle fault detected during Washing Machine program execution.
There is a communication failure between the main control board and the display board.
Check the ribbon cable and connectors between the two boards for secure connections and damage.
Dispenser communication error
The main control board cannot communicate with the motorized soap dispenser.
Check the wiring between the dispenser assembly and the main board. The dispenser unit may be faulty and require replacement.
Ariston F15: Water level pressure sensor/switch frequency anomaly detected in Dishwasher.
The control board is unable to determine the water level correctly. This system relies on pump motor feedback rather than a physical switch.
This can be caused by excessive suds (wrong detergent), a blocked filter, or a faulty wash motor/control board. Check for these issues.
Internal data error on control board
A data corruption or firmware issue has occurred on the main PCB.
Attempt a hard reset by unplugging the appliance for 20-30 minutes. If the fault persists, the main control board needs to be replaced.
Ariston F21: NTC temperature sensor signal out of range (open or short circuit) in Hob / Cooktop.
General fault related to the temperature measurement system.
Check the temperature sensor and its wiring. Reset the hob by disconnecting power for 5 minutes.
Incorrect power supply voltage
The control board has detected that the incoming mains voltage is too high or too low.
Verify the household electrical supply is stable and within the correct voltage range for the appliance.
Power board communication error
The user interface board cannot communicate with the main power board.
Check the connecting wires and plugs between the hob's control boards. A faulty board may need replacement.
Pyrolytic cleaning cycle error
An issue has occurred during the self-cleaning cycle, often related to the door lock or excessive temperature.
Allow the oven to cool completely. Reset by turning off the power. Check the door lock mechanism for proper operation.
Ariston H20: Water inlet / filling timeout in Washing Machine; appliance fails to fill to minimum operational level.
The machine is not filling with water or is filling too slowly. The water supply tap may be closed, or the inlet hose/valve is blocked.
Ensure the water tap is fully open. Check the inlet hose for kinks. Clean the filter inside the water inlet valve.
Ariston L: Operational cycle fault detected during Hob / Cooktop program execution.
The child lock feature has been turned on, disabling the hob controls.
Deactivate the child lock. This usually involves pressing and holding a specific key (often marked with a key or lock symbol) for several seconds.
Door lock activated for pyrolytic cleaning
This is not an error but an indicator that the oven door has locked automatically for a high-temperature cleaning cycle.
Wait for the pyrolytic cleaning cycle to finish and for the oven to cool down completely. The door will unlock automatically.
Ariston STOP: Operational cycle fault detected during Oven / Microwave program execution.
Indicates that the cooking program has been stopped or there was a brief power interruption.
Reset the cooking program and start again. If caused by a power cut, wait for power to be restored and reprogram.
Our official certified partners service Ariston appliances in your area.