Ariston Washer Error Code F08

F08 on an Ariston washer indicates a conflict involving the wash heater relay and the pressure switch. The board has detected either a heater relay stuck closed while the drum is empty, or the pressure switch is reporting the drum as both empty and full at the same time. The machine stops operation to prevent unsafe conditions such as dry heating. Diagnosis starts with inspecting the J3 connector on the main control card.

No, you should not continue using the washer while F08 is active. The error indicates the machine cannot reliably determine the water level or control the heating element, which could result in the heater running dry and causing damage to internal components. Stop using the appliance until the fault has been properly diagnosed and resolved.

Repair costs vary depending on the faulty component. If only the J3 connector needs cleaning and reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. A replacement pressure switch generally adds $20 to $60 in parts. If the control board needs replacement, total repair costs including labor can range from $150 to $350 or more depending on parts availability and local labor rates.

Some steps are accessible to a knowledgeable DIYer, such as inspecting and reseating the J3 connector or checking the pressure switch air hose for kinks and blockages. However, testing relay contacts, measuring pressure switch continuity, and replacing control board components generally require electrical diagnostic skills and proper tools. If you are not comfortable working with appliance wiring, a qualified technician should handle the repair.

A power reset may temporarily clear the error code, but if the underlying fault with the J3 connector, pressure switch, or heater relay is still present, the code will return during the next wash cycle. A reset alone is not a fix. The root cause must be identified and corrected for the error to stay cleared.