Display alternates between speed setting and 'Lo'; pump runs at reduced output or stops.

Safety: Turn off power before opening the pump lid or filter.

• Clean baskets: Empty skimmer and Hurlcon pump baskets of all debris.
• Service filter: Backwash sand/DE filters or hose off cartridge filters until pressure returns to normal operating range.
• Check valves: Ensure all suction and return valves are fully open.
• Inspect for air: Look for air bubbles under the pump lid or at pool returns. Reseat the pump lid O-ring and tighten unions.

Once flow is restored, the 'Lo' indication should clear automatically.