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Error code reference

Ariston Oven Error Code ER87

Key14 fault on Touch control

Ariston codesAriston oven codes

Key14 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 ER87 means on a Ariston oven

ER87 is a touch control fault code specific to Key14 on the Ariston oven's capacitive touch interface. The touch control board uses an array of inductive sensor points, each corresponding to a specific function button. Key14 is one of these sensor positions, and when the control board detects an abnormal or unresponsive signal from that input, it flags ER87 to alert the user and technician that this particular button zone is not functioning correctly.

The most common trigger for ER87 is moisture or condensation on or beneath the touch panel surface. Steam generated during cooking can migrate to the control area and temporarily alter the capacitance readings at Key14, causing the board to interpret the sensor as faulted. This is why the first diagnostic step is to open the oven door and allow the condensation to fully dry before drawing any further conclusions. If the code clears after drying, no parts replacement is needed.

If the error persists after the panel has dried, the next area to inspect is the inductive rubber interface pieces that sit between the touch panel and the display board. These rubber components transfer the capacitive signal from the glass or panel surface to the board's sensor pads. A missing, displaced, or degraded rubber piece will break that signal path and cause a permanent fault at that key position. If all inductive rubber pieces are confirmed present and properly seated and the fault remains active, the display board itself is the likely failed component and should be replaced.

Source: manufacturer service documentation.

Common causes of ER87

  1. 01

    Condensation on the touch panel

    Wiring / connection

    Steam from cooking can accumulate on or behind the touch control surface, disrupting the capacitive signal at Key14. Opening the oven door and allowing the area to fully dry often clears the fault without any parts replacement.

  2. 02

    Missing or displaced inductive rubber piece

    Part replacement

    The touch panel relies on small inductive rubber components to transfer the capacitive signal from the panel surface to the board's sensor pads. If one of these pieces is missing, shifted, or degraded, Key14 will register as a permanent fault.

  3. 03

    Failed display board

    Part replacement

    If condensation has been ruled out and all inductive rubber pieces are confirmed present and properly positioned, the display board itself may have a failed sensor input for Key14. Replacement of the display board is the recommended corrective action in this scenario.

  4. 04

    Physical damage to the touch panel surface

    Part replacement

    Cracks, chips, or heavy soiling directly over the Key14 sensor area can interfere with the capacitive detection and produce a sustained fault code. Inspect the panel surface carefully for any visible damage or residue buildup.

See the test procedure for each cause

Frequently asked questions about ER87

What does ER87 mean on a Ariston oven?
ER87 indicates a fault at Key14 on the Ariston oven's touch control panel. The control board has detected an abnormal or absent signal from that specific button sensor. This can be caused by moisture, a missing inductive rubber component, or a failed display board. The first step is to open the door and let any condensation dry before assuming a hardware failure.
Can I fix ER87 on my Ariston oven myself?
If the fault is caused by condensation, you can resolve it yourself simply by opening the oven door and waiting for the moisture to evaporate, then checking whether the code clears. If the error persists, a technician will need to inspect the inductive rubber pieces behind the touch panel and potentially replace the display board, which involves disassembling the control area.
Is it safe to use my Ariston oven while it shows ER87?
ER87 relates specifically to a touch button malfunction and does not indicate a heating, gas, or electrical safety hazard on its own. However, if the affected Key14 button controls a cooking function you need, the oven may not respond correctly to inputs. It is best to resolve the fault before relying on the oven for normal use.
Will resetting the oven clear the ER87 code?
A power reset may temporarily clear the code if the underlying cause is transient, such as condensation that has already evaporated. However, if the inductive rubber component is missing or the display board has failed, the code will return after the reset. A lasting fix requires addressing the physical cause of the Key14 sensor fault.
How much does it cost to repair an Ariston oven showing ER87?
If the fault is only condensation-related, there is no parts cost at all. If the inductive rubber pieces need to be sourced and fitted, costs are typically low. Replacing the display board is the most expensive scenario, with parts and labor combined generally ranging from around $150 to $350 or more depending on the specific model and local labor rates.

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