Dishwasher displays E11; spray arms may not rotate and wash performance is poor.

Safety first: Disconnect power before working under the tub.

• Inspect spray arms: Remove upper and lower spray arms. Check for cracks, clogs in the jets, or broken mounting hubs. Clean thoroughly and replace if damaged.
• Check diverter mechanism: Access the sump area from below. Locate the diverter motor and disc assembly that directs water to different spray zones.
• Test diverter motor: Disconnect the motor and measure resistance across its terminals. An open circuit indicates failure. Also check for free movement of the diverter disc.
• Inspect wiring: Ensure the harness to the diverter motor is intact and connectors are secure.
• Replace diverter assembly if faulty: Install a new diverter motor/disc assembly if the motor is open or the disc is jammed or worn.
• Reassemble and test: Reinstall spray arms, restore power, and run a cycle to verify proper spray action and that E11 is cleared.