While you wait for answers, we may have found some information which could help you.
Click here for Stopped Entirely BangHygena APP2420 fan cuts outer after 5 mins?
Hygena AP2500 Cooker Hood?
Where can I obtain a Bulb Cover for a Hygena APM 2592 Cooker Hood?
How can I fix my Hygena Cooker hood - APP2300?
How can i fix the cooker hood Hygena PCB for APP2440?
hygena app2410 cooker hood?