To dream of a vacuum cleaner represents your preoccupation or motivation to finally deal with problems. Noticing things going away. Being proactive or solution oriented. Cleaning up your act or attitude. A focus on finality or getting something cleared up. Noticing negativity or problems having to go away. Ridding yourself of outdated ideas and bad habits. Tidying up your life.
To dream of a broken vacuum cleaner represents your lost motivation or ability to tidy up some area of your life. Feeling that it's not possible to have the perfectly responsible or professional appearance that you want.
Example: A man dreamed of using a vacuum cleaner. In waking life he finally got to tackle a number of issues that he had previously been too distracted to deal with. He was very motivated to do so.