Appliance Repair Questions? Ask a Technician for Answers ASAP
This sounds like a motor issue. That is the only thing that would account for all three of your complaints. The noise is coming from the motor, it is not cleaning plastic ware because it is not pumping strong enough, and the water needs to heat to advance the cycle quickly. If the motor is not working correctly, it will not pump water effectively through the heater and thus it will not heat quickly enough.