Why is my metal box fan making a scraping or rattling sound?

A scraping or rattling sound is different from normal running noise and can point to a loose grille, something touching the blades or a part that has shifted during cleaning or moving. It is sensible to stop and check it promptly, because continuing to use a fan with a mechanical fault can make the damage worse. If the noise remains after the checks below, stop using it and contact the retailer where it was purchased.

Switch off and inspect safely

1. Unplug the fan before touching it.
2. Look through the grille for any loose object or debris.
3. Check that the front and rear guards are fitted correctly.

If the noise disappears once the guard is secured, the issue was likely a loose fitting.

Check for contact during rotation

1. Gently turn the blades by hand only when the product is unplugged.
2. Listen for rubbing or catching.
3. Make sure nothing on the desk or floor is touching the fan housing.

Blades should turn freely without scraping.

Test the angle and placement

1. Adjust the fan angle slightly, then restart it.
2. Move it to a stable surface away from walls or other objects.

If the noise changes with the angle, the fan may have been positioned too close to something.

When to stop using it

Stop using the fan if the sound is metallic, persistent or accompanied by vibration, heat or a burning smell. These signs suggest a fault that should not be ignored. In that case, contact the retailer where it was purchased, who can explain the available next steps.