Our Customer brought us this AirFlo Central Vacuum form Arlington Heights with reduced suction. This Arflo vacuum is a 3 motor machine, most central vacuums have 1 motor and some have 2 motors. After trouble shooting the AirFlo vacuum we determined that it did not have a bad motor, all3 motors were strong, it did have a bad relay and faulty wiring. After replacing the relay and re wiring the AirFlo vacuum is back in workiong order.