Respuesta :
Fan is actually a Electro-magnetic motor so the symbol used for motors can also be used for a fan ( "M" written in a circle )
Answer: The symbol of a motor, a letter M inside a circle.
Explanation: A fan works with a small motor, that allows the blades to spin, and this is a simplifyed explanation of how a fan works.
So the symbol in the circuit will be the one of a motor, that is represented with a letter M inside a circle.