Dishwasher fills with water but does not wash; you hear only a faint hum or nothing at all, and spray arms do not move.

Safety first: Disconnect power and water. Internal components can be sharp and heavy.

• Listen for motor: During a wash cycle (before disconnecting), note if you hear a hum or clicking. A hum without water movement suggests a stuck motor.
• Check for obstructions: Remove filters and inspect the sump for foreign objects blocking the impeller.
• Access pump: From the bottom, remove the circulation pump assembly. Inspect the impeller for damage and attempt to spin it by hand. It should turn smoothly.
• Replace pump assembly: If the motor is seized or impeller is damaged, install a new Zline circulation pump assembly.