Ariston Oven Error Code ER85

ER85 indicates a Key12 fault on the touch control system. The oven's display board has detected a malfunction on the Key12 touch input channel, which can be caused by moisture, a missing inductive rubber interface piece, or a failed display board. It is a touch control diagnostic code rather than a heating or safety system error.

ER85 relates to a touch button malfunction rather than a heating element or temperature sensor failure, but a faulted control panel may prevent you from operating the oven reliably or at all. It is best to resolve the fault before continued use to ensure accurate control input and avoid unintended operation.

If the fault is caused by condensation and clears on its own after drying, there is no parts cost. Replacing a missing inductive rubber piece is typically a low-cost fix. If the display board requires replacement, parts and labor costs can range from roughly $150 to $400 or more depending on the specific model and local labor rates.

In many cases, yes. Start by opening the oven door and giving the touch control panel time to dry out completely, as condensation is the most frequent cause of this fault. Also check that all the small inductive rubber pieces on the touch panel are present and correctly seated. If the error clears after drying, no parts are needed.

A power reset may temporarily clear the code, but if the underlying cause such as moisture or a faulty board is still present, the fault will return. Allow the panel to dry fully before resetting, and confirm all inductive rubber components are in place. If the fault reappears after a reset, further diagnosis or board replacement is needed.