Dishwasher fills with water but does not wash; you hear a hum or silence and spray arms do not move.

Safety: Disconnect power and water. The dishwasher may need to be pulled out for access.

• Confirm fill: Start a cycle and open the door after a few minutes to verify water is present in the tub.
• Listen for motor: A low hum without water spraying indicates a stuck or failed motor.
• Check for obstructions: Remove lower rack, spray arm, and filters. Inspect the sump for broken glass, bones, or other debris that could jam the impeller.
• Access circulation pump: From underneath, remove the wash motor from the sump. Inspect and clean the impeller. If the impeller is damaged or the motor shaft is stiff, replace the circulation pump assembly.
• Test motor electrically: Use a multimeter to check motor winding resistance. Replace the pump if readings are open or shorted.