Question about Rowenta Turbo Silence Extreme

Same thing for me. Slight noise when the sweep is on at night.
By deactivating it and leaving only the propeller running on "silent night", it is discreet

On the fan, close to the handle, there is a big push/pull button to activate the sweep or static mode. However, mine does not make any noise in either sweep or static mode

Just do a standard exchange with digitec, especially if it is still under warranty... :)