Ariston Washer Error Code F05

F05 on an Ariston washer means the machine has detected a drainage fault. Specifically, either the drain pump is blocked and cannot remove water from the drum, or the pressure switch has not confirmed that the tub reached an empty water level. The washer will stop the cycle until the fault is resolved.

You should not continue running the washer while F05 is active. The machine is indicating it cannot drain properly, and forcing cycles with standing water in the drum can stress internal components and may eventually lead to water leaking onto the floor. Address the drainage fault before resuming normal use.

Repair costs vary depending on the cause. If the fix is simply cleaning the pump filter or straightening a drain hose, the cost may be minimal or nothing at all. Replacing a faulty drain pump typically costs between 80 and 200 dollars in parts and labor, while a control board replacement can range from 150 to 350 dollars or more depending on parts availability and the technician's rates.

Start by cleaning the drain pump filter, which is the most common cause of this error. Next, check the drain hose for kinks or blockages. If those steps do not resolve it, a technician should check for 220V at the J9 connector pins 8 and 9 on the control board to determine whether the pump is receiving power. From there, the pump itself and the pressure switch should be tested.

A reset may temporarily clear the F05 code, but the error will return if the underlying cause has not been fixed. If the pump filter is clogged or the drain hose is kinked, clearing the obstruction before resetting will allow the machine to resume normal operation. Without addressing the root cause, the fault will reappear during the next drain cycle.