Your washing machine’s motor may make humming or whirling sounds while the drum is spinning. If you’re only hearing these sounds while your appliance is draining, there could be a problem with the drain hose.
The drainage hose removes water from the drum. It shouldn’t be bent or clogged. Check the hose and unclog or straighten it if necessary.
If your appliance isn’t operating normally while making this noise, contact an authorised service agent.