Smeg ALFA201XE - Manual (Page 13)

Instructions for the User
32
4.13 Possible error messages on the display
4.13.1 Err1
This message appears whenever the software detects that the sensor
connector is not properly connected to the electronic circuit board or has
short-circuited.
This error resets automatically when the oven’s power supply is switched
off. If the error persists, call the After-Sales Service.