Tecnoeka Er3

What does Tecnoeka Er3 mean?

Er3 is displayed on the temperature display with an alarm that can be silenced by pressing the button. It signals that the electronic board is overheating, either because the aeration openings in the metal walls are blocked or because heat sources are too near the oven. Cooking can continue, but the cause of the overheating must be removed.

Symptoms

• Er3 shown on the temperature display
• An alarm sounds that can be silenced by pressing the button
• Cooking can continue while the alarm is active
• The electronic board is running hot

Common causes

• Aeration (ventilation) openings in the metal walls blocked
• Heat sources placed too near the oven
• Restricted airflow around the electronics causing board overheating

Diagnostic steps

1. 01

   Silence the alarm

   Press the button to silence the Er3 alarm; cooking can continue while you address the cause.

2. 02

   Unblock the aeration openings

   Clear the aeration openings in the metal walls so the electronic board can dissipate heat, as the manual directs.

3. 03

   Remove nearby heat sources

   Eliminate any heat sources positioned too close to the oven that are raising the board temperature.

4. 04

   Resolve before continuing

   Remove the cause of the fault causing the electronic board to overheat before relying on the oven for further cooking.

When to call a professional

Er3 is usually resolved on site by clearing the aeration openings and moving heat sources away from the oven, so professional service is not the first step. Call a qualified technician if the alarm persists after the ventilation is clear and no heat sources are nearby, since continued board overheating without an obvious cause points to a fault that needs trained inspection.