Controller displays LOWP or LOW PRESS and shuts off solar heating; filter pressure gauge reads unusually low.

Safety first: Turn off power to the pump before opening the pump lid or baskets.

• Clean baskets: Empty the skimmer and pump strainer baskets of leaves and debris to restore flow.
• Prime the pump: Fill the pump strainer housing with water, replace the lid with a lubricated O-ring, and restart the pump to achieve full prime.
• Check for air leaks: Inspect the pump lid O-ring, suction unions, and valves for bubbles or water drips. Tighten fittings and replace worn O-rings.
• Adjust pump speed: For variable-speed pumps, program a higher speed when solar is active to maintain adequate pressure and flow through the Heliocol panels.
• Verify water level: Ensure the pool water level is high enough to prevent air from being drawn into the skimmer.