Why Is My Air Conditioning Unit Shaking?
A shaking air conditioning unit should be a reason for concern for anything mechanical that normally doesn't vibrate or shake when it's operating.
Difference Between Central Air Conditioning and Forced Air
With home comfort, there are some terms that tend to be a common source of confusion because of some overlaps with definitions. Two of these are central air conditioning and forced air. Part of the reason for this is how central AC systems work.