Direct answer
A brief hum can be a drain or inlet valve, but continuous humming without water movement can mean a blocked pump, closed supply or seized circulation motor.
What this covers
- Dishwashers · noise
- The exact symptom in the title before component-level repair
- Consumer-accessible controls, connections and maintenance areas
What it does not cover
- ×Smoke, burning odor, swelling, liquid on powered parts or damaged wiring
- ×Opening sealed panels, bypassing interlocks or live-electrical testing
- ×Account ownership, billing or warranty disputes
Observe before changing anything
ReversibleIdentify whether the hum occurs at initial drain, fill or the main wash stage.
Isolate the failing boundary
ReversibleCheck supply, filter, pump cover and spray-arm freedom with power disconnected.
Apply the narrow correction
ReversibleCorrect the accessible restriction and run one empty short cycle.
Verify the result and stop at the boundary
ReversibleStop for a hot motor smell, no water circulation or a hum that persists after the path is clear.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check first for “Dishwasher hums but does not wash”?+
Identify whether the hum occurs at initial drain, fill or the main wash stage.
How do I know whether the problem is external or inside the device?+
Check supply, filter, pump cover and spray-arm freedom with power disconnected.
When should I stop and request repair?+
Stop for a hot motor smell, no water circulation or a hum that persists after the path is clear.
Answer for the exact device and software version shown above.