Pool does not heat adequately even on sunny days; solar system appears to run normally with no error codes.

Safety first: Ensure safe access to roof for any panel inspection. Turn off pump before adjusting valves.

• Check panel orientation: Confirm Heliocol panels are installed on a roof plane with good sun exposure (ideally south-facing in the northern hemisphere) and minimal shading.
• Verify flow: Ensure the solar valve fully directs water through the panels when active and that the pump speed is adequate. Adjust variable-speed pump settings if necessary.
• Use a pool cover: Reduce nighttime and wind-driven heat loss by using a solar blanket or cover when the pool is not in use.
• Evaluate system sizing: Compare your installed collector area to Heliocol sizing guidelines for your pool surface area and climate. Consider adding additional Heliocol panels if undersized.