Brush the outside of your machine with a soft brush to remove any debris from the shroud.
Dyson fan noise problem.
Get expert help troubleshooting from dyson to get the most out of your machine.
The fan has a strong smooth airflow when switched on.
Try to clean the blower section of the fan.
Look for blockages in the air inlet holes on the shroud and the ball.
There s a problem with the oscillation.
Hold a newspaper approximately 2 meters 6 6 away from the product with the airflow control dial turned to maximum.
This may be causing the motor to work extra hard resulting in the noise i have posted an article on how to do this at the following link.