F6 E4 — User Interface/Appliance Manager communication mismatch

What does F6 E4 mean?

There is a disagreement or communication problem between the oven's user interface and its main appliance manager. This can lead to incorrect operation or status display.

• Temporary internal communication issue
• Faulty user interface (UI)
• Faulty Copernicus Appliance Manager

Click steps to track your progress.

1. 1

   Unplug the oven or disconnect its power at the circuit breaker for at least 10 seconds.

2. 2

   Plug the oven back in or restore power.

3. 3

   Observe the display for any change or if the error disappears.

4. 4

   If the error persists, contact customer service for assistance.