Dishwasher Is Making Buzzing Noise During Wash Cycle Dishwasher

Chosen Solution

Suddenly since today our Bosch dishwasher SMU50E75AU/36 is making a buzzing noise. It’s changing frequency during the cycle and sometimes stops. It still works fine. Sound comes from bottom of device, not from inside. See video with sound here.

When the dishwasher starts to make funny noises or working load it is usually because there are debris caught in the draining pump, although a problem with the motor is not an exception. Drain Pump: The drain pump needs to be checked for debris. If its clean and noisy it needs to be replaced. Circulation Pump: Bearings inside the circulation pump will wear out over time and can cause a loud groaning sound while the dishwasher operates.