Joined: Jul 2010
Location: Boston MetroWest
I'm not farmiliar with your specific setup, but I might be able to help you. Coud you draw up a schematic of your wiring and post it? Please include where the wires are going to the relay, i.e. the relay contacts vs relay coil.
Capacitors act as filters. They block DC current and pass AC current. The cap in your circuit might be to help the motor at start-up, filter noise from the motor, or protect the relay contacts.