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Error code reference

Ariston Oven Error Code ER86

Key13 fault on Touch control

Ariston codesAriston oven codes

Key13 fault on Touch control — touch button malfunction.

First step from the service manual

Open door, wait for condensation to dry; if fault persists and all inductive rubber pieces are present, replace display board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What ER86 means on a Ariston oven

ER86 is a touch control fault code specific to Key13 on the Ariston oven's capacitive touch interface. The touch control board relies on inductive rubber contact pieces positioned beneath each touch zone to register finger input. When Key13 fails to respond correctly, or registers a continuous or erroneous signal, the control board detects the discrepancy and triggers ER86. This can result from physical contamination, moisture interference, or a hardware failure within the display board itself.

Condensation is the most common trigger for this fault. Steam and moisture produced during cooking can migrate into the door area and settle on the touch panel surface or underlying components, causing false readings or total loss of function on a specific key. Ariston's first diagnostic step specifically addresses this by recommending the door be opened and the unit allowed to dry before assuming a hardware fault.

If the fault persists after drying, the next physical check involves confirming all inductive rubber pieces are seated correctly beneath the touch zones. These small rubber components transmit the capacitive signal from each key position to the control board. A missing or displaced piece on the Key13 position will cause a permanent fault regardless of board condition. If all rubber pieces are present and correctly positioned and the error remains, the display board itself has failed and requires replacement.

Source: manufacturer service documentation.

Common causes of ER86

  1. 01

    Condensation on touch panel

    Wiring / connection

    Steam from cooking can condense on or behind the touch control surface, causing Key13 to send a faulty signal to the board. Opening the door and allowing the panel to dry completely often clears this fault without any further action.

  2. 02

    Missing or displaced inductive rubber piece

    Part replacement

    Each touch key relies on a small inductive rubber piece seated beneath the touch zone to function correctly. If the rubber piece behind Key13 has shifted or is missing, the key will report a fault even if the board is undamaged.

  3. 03

    Failed display board

    Part replacement

    If condensation has been ruled out and all inductive rubber pieces are present and properly seated, the touch control display board itself has likely failed internally. Replacement of the display board is the indicated repair at this stage.

  4. 04

    Contamination or residue on touch surface

    Wiring / connection

    Grease, cleaning product residue, or food debris on the touch panel surface can interfere with capacitive sensing on Key13 and cause persistent false readings. Cleaning the panel surface thoroughly may help before escalating to component-level diagnosis.

See the test procedure for each cause

Frequently asked questions about ER86

What does ER86 mean on a Ariston oven?
ER86 indicates a Key13 fault on the Ariston oven's touch control panel. The control board has detected that Key13 is not functioning correctly, either due to moisture, a missing inductive rubber component, or a hardware failure on the display board. It does not indicate a heating or electrical safety fault. The first step is to open the oven door and allow any condensation to dry before investigating further.
Can I fix ER86 myself without replacing parts?
In many cases, yes. Condensation is the most common cause, and simply opening the oven door and waiting for the moisture to evaporate can clear the fault. You should also visually inspect the touch panel for any obvious contamination or residue and clean the surface carefully. If the error returns after drying and cleaning, a physical inspection of the inductive rubber pieces behind the touch keys is the next step before committing to a part replacement.
Is it safe to use my Ariston oven while ER86 is displayed?
ER86 relates to the touch control interface rather than the heating system or any safety-critical component, but the oven may not respond correctly to input while the fault is active. Attempting to operate the oven in this state is not recommended, as you may not be able to control or cancel cooking functions reliably. Allow the panel to dry and the fault to clear before using the oven again.
Will resetting the oven clear the ER86 error?
A power reset, such as switching the oven off at the circuit breaker for a few minutes, may temporarily clear the code if moisture was the underlying cause. However, if the inductive rubber component is missing or the display board has failed, the error will return as soon as the oven is powered back on. A reset should be considered a diagnostic step rather than a permanent solution.
How much does it cost to repair an Ariston oven showing ER86?
If the fault is caused by condensation or a displaced rubber component, repair costs can be minimal, primarily covering a service call fee in the range of $50 to $120 if a technician is involved. If the display board requires replacement, part costs typically range from $80 to $250 depending on the model, with additional labor charges on top. Getting a diagnosis before ordering parts is advisable to avoid unnecessary expense.

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