This is a problem which most users of the Mini Jet will not encounter.
It is caused by a gear inside the pump becoming stuck due to:
This problem is identified by a buzzing sound coming from the motor, but your fan at the rear of the unit is not turning.
Contact your store of purchase or Buon Vino Manufacturing for assistance in correcting this problem. Although the above problem is not difficult to fix, please do not start taking the pump apart before being made fully aware of the proper procedures necessary to correct the malfunction. The procedure requires specific tools and the removal and re-insertion of parts in the correct order.