Heater runs but causes noticeable air bubbles or turbulence in the pool returns.

Safety first: Turn off pump and power before adjusting plumbing valves.

• Check for air leaks: Inspect the pump lid O-ring, suction unions, and fittings for air leaks that could introduce air into the system.
• Bypass adjustment: If a manual bypass is installed, adjust it to reduce excessive flow through the Nirvana heater while maintaining minimum required flow.
• Bleed heater: Use any air bleed valves on the heater to remove trapped air from the heat exchanger.
• Plumbing review: Ensure the heater is installed per Nirvana guidelines, with proper elevation and straight pipe runs to minimize turbulence.