Capacitor Attic Fan

These motors have two coils a start and run winding.

Capacitor attic fan.

Most ceiling fans use a type of motor known as a permanent split capacitor motor. This way both the starting and running windings are connected in parallel across the single phase ac supply voltage 120v in us 230v in eu. They are a self healing flat capacitor winding with polyester film dielectric. A ceiling fan without a capacitor.

In this video i will show you how to replace the starter capacitor in a whole house fan. Delivering torque to the fan motor if the capacitor is faulty there won t be enough power delivered and the blower wheel fan belt and other important components can cease to operate. A capacitor is connected in series with the start winding to insert a phase shift but once the motor is up to speed it becomes an auxiliary winding. Suppose there is no capacitor connected in the ceiling fan motor circuit.

To inspect the capacitor make sure it is discharged. They are mounted in a flame retardent plastic case with an epoxy r. The cfc series is a range of metallized polyester film capacitors designed expressly for ceiling fan use.