Air Conditioner 
To dream that the air conditioner is not working indicates that you are anxious and tense. A certain aspect or circumstance in your life has you feeling nervous and apprehensive.
To see or feel the air conditioner in your dream symbolizes release of pressure and stress. You are no longer concerned or upset about a problem or disagreement
Perpetual Motion
To dream of perpetual motion suggests you are feeling worried and uneasy about a circumstance. You are dissatisfied with predictability and repetitiveness in your daily life, career, and relationships. You want change.
Hammerhead shark
Dreaming of a hammerhead shark denotes your fear of an enemy or danger. While fish and dolphins are beneficial and positive images to see in a dream, sharks in general represent all things greedy and cold. Regularly dreaming of a hammerhead shark means that there is someone in your life who may be deceiving you in some way. They are not being completely honest with you.