Dishwasher made an extremely loud and annoying noise, which came from the detergent and rinse aid dispenser motor.

The replacement of the old with the new was very easy, however after the installation was complete the noise from the new detergent and rinse aid dispenser motor was exactly the same as the old. So at this point I have no idea what is really wrong with the dishwasher. I may have to call in a repair contractor after all. Any suggestions would be appreciated.