Sean, I don't own a fanzilla but as I understand it , It only staggers the fans coming on. The most likely thing that keeps the fans from coming on could be: #1. Switch in water pipe, Lower left hand in lower motor compartment. Jumper the wires and see if the fans come on, If they do then switch is most likley bad. #2. Check relays, circut breakers and fuses also. John ]vin 11004