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Error code reference

Ariston Oven Error Code ER90

Key17 fault on Touch control

Ariston codesAriston oven codes
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What the ER90 error code actually means

Your oven's touch control panel has detected a problem with one of its buttons, specifically the button assigned to function Key17. This is often caused by steam or moisture getting into the control panel area during cooking. In many cases, leaving the oven door open to let it dry out will clear the error, but if the problem keeps coming back, the control panel board may need to be replaced.

Diagnostic procedure

The full ER90 procedure

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1
First diagnostic step
Open door, wait for condensation to dry; if fault persists and all inductive rubber pieces are present, replace display board.
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Most common causes of ER90

Ranked by how often they cause this code
  1. 1Condensation on the touch panel
  2. 2Missing or dislodged inductive rubber contact piece
  3. 3Damaged inductive rubber contact piece
  4. 4Failed display board

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Questions people ask about ER90

What does ER90 mean on a Ariston oven?
ER90 on an Ariston oven indicates a Key17 fault on the touch control panel, meaning one specific touch button is malfunctioning or sending an incorrect signal. The error is commonly triggered by moisture or condensation behind the panel, or by a missing inductive rubber contact piece. Opening the oven door and allowing the control panel to dry is the recommended first step. If the code persists after drying, further inspection of the touch panel components is needed.
Is it safe to use my Ariston oven while the ER90 code is showing?
It is generally advisable to avoid using the oven until the fault is resolved. A malfunctioning touch key could prevent you from accurately controlling oven settings or responding to other alerts. Allow the panel to dry first, and if the code clears, normal use can resume. If the error persists, have the oven inspected before continuing to cook with it.
How much does it cost to fix the ER90 error on an Ariston oven?
If the error is caused only by condensation, there is no cost involved since allowing it to dry resolves the fault. A replacement inductive rubber contact piece, if needed, is typically a low-cost part. Replacing the display board is the most expensive scenario, with parts and labor combined potentially ranging from $100 to $300 or more depending on the model and service rates in your area.
Can I fix the ER90 error myself without calling a technician?
In some cases, yes. Start by opening the oven door and letting any condensation dry out completely, which resolves the fault for many users. If the error returns, you can inspect the inductive rubber contact pieces beneath the touch panel to check whether any are missing or displaced. However, if the display board itself has failed, replacing it requires comfort with appliance disassembly and electrical components, so a technician may be preferable.
Will resetting the oven clear the ER90 error code?
A simple power reset may temporarily clear the code, but if the underlying cause such as moisture or a damaged rubber contact piece is still present, the error will return. Allow the control panel to fully dry before attempting a reset. If the fault is due to a failed display board, resetting the power will not resolve it and the board will need to be replaced.

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