mypros+
Error code reference

Ariston Oven Error Code ER79

Key6 fault on Touch control

Ariston codesAriston oven codes

Key6 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.

MyPros+ Max

Get the full diagnostic procedure for ER79.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What ER79 means on a Ariston oven

ER79 is a touch control fault code specific to Key6, one of the capacitive or inductive touch buttons on the oven's display board. The touch control panel uses inductive rubber contact pieces positioned beneath or against the glass surface to register button presses. When the control board detects an abnormal or unresponsive signal from the Key6 position, it logs this fault and may disable some or all touch functions to prevent erratic operation.

The most frequent trigger for ER79 is moisture or condensation on or near the touch panel. Steam generated during cooking can migrate toward the control area and disrupt the capacitive sensing circuit, causing the board to misread the Key6 input as a continuous press or a dead zone. This is why the first diagnostic step involves opening the oven door and allowing the panel to dry out completely before drawing any further conclusions.

If the fault persists after drying, the next inspection point is the physical condition of the inductive rubber pieces associated with Key6. These small rubber components act as the mechanical and electrical interface between the glass surface and the sensing circuitry. A missing, displaced, or degraded rubber piece will produce a permanent fault signal at that key position. If all rubber pieces are confirmed present and the error remains, the display board itself has developed an internal fault and requires replacement.

Source: manufacturer service documentation.

Common causes of ER79

  1. 01

    Condensation or moisture on the touch panel

    Wiring / connection

    Steam from cooking can settle on or behind the touch control surface and disrupt the Key6 sensor signal. Opening the oven door and allowing the panel to dry completely often resolves this without any parts replacement.

  2. 02

    Displaced or missing inductive rubber piece at Key6

    Part replacement

    Each touch button relies on a small inductive rubber contact piece to transmit input to the board. If the rubber piece for Key6 has shifted out of position or is absent, the button will register a permanent fault.

  3. 03

    Faulty display board

    Part replacement

    If moisture has been ruled out and all rubber pieces are confirmed present and correctly positioned, the sensing circuitry on the display board itself has likely failed and the board must be replaced.

  4. 04

    Physical damage to the touch panel surface

    Part replacement

    Cracks, chips, or deep scratches over the Key6 area can interfere with the inductive sensing function. Inspect the glass or panel surface directly above the Key6 position for visible damage.

See the test procedure for each cause

Frequently asked questions about ER79

What does ER79 mean on a Ariston oven?
ER79 indicates a fault with Key6, one of the touch buttons on the oven's touch control panel. The control board has detected an abnormal signal from that specific button position. This can be caused by moisture, a displaced internal rubber contact piece, or a failed display board. The error may clear on its own after the panel dries out.
Can I fix the ER79 error myself without calling a technician?
The first step you can take yourself is opening the oven door and allowing any condensation around the control panel to dry completely, which sometimes resolves the fault. If the error persists, you can inspect the touch panel area for visible damage or debris. Beyond that, resolving the issue requires accessing the internal inductive rubber pieces or replacing the display board, which involves disassembling the control panel and is better suited to someone with appliance repair experience.
Is it safe to keep using my Ariston oven while ER79 is displayed?
ER79 relates to the touch control interface rather than a heating or safety-critical component, so the risk level depends on how the oven responds to the fault. If the oven becomes unresponsive or behaves erratically due to the Key6 fault, it is best to stop using it until the issue is diagnosed. Continuing to use an oven with a malfunctioning control panel can make it difficult to set or change cooking functions reliably.
Will resetting the oven clear the ER79 error code?
A power reset by switching off the oven at the breaker or unplugging it for several minutes may temporarily clear the error if it was triggered by a transient moisture event. However, if the underlying cause is a damaged inductive rubber piece or a failed display board, the fault will return after power is restored. A reset is worth attempting but should not be relied upon as a permanent fix.
How much does it cost to repair an Ariston oven showing ER79?
If the fault clears after drying, there is no parts cost involved. If the inductive rubber piece needs to be replaced, parts costs are typically low, though labor charges from a technician will apply. A full display board replacement, which is the most involved repair for this fault, generally brings total costs into the range of $100 to $300 or more depending on parts availability and local labor rates.

Related Ariston oven codes

All Ariston oven codes
View all 44 Ariston oven codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass