U.S. Motors pool pump controller shows E11 and the motor will not start; sometimes occurs after a power outage.

Safety first: Disconnect power before opening the controller housing.

• Power reset: Turn off the breaker for 5 minutes to fully discharge the controller. Restore power and check if E11 clears.
• Factory reset: Use the controller menu to perform a factory reset or memory clear as described in the U.S. Motors documentation. Re-enter all schedule and speed settings.
• Surge protection: If E11 followed a storm or outage, consider adding a surge protector at the pool sub-panel to prevent future memory corruption.
• Board replacement: If E11 returns immediately after reset and power cycling, the memory device on the control board is likely defective. Replace the pump control board.