Hayward Pool Heater Low Flow . You can count on genuine hayward replacement parts for continued reliability. It happens for a dirty flame sensor. Hayward HeatPro 95000 BTU Pool and Spa Heat Pump from lesliespool.com In order for a heater to operate smoothly and efficiently, it’s important that pool system maintains a consistent flow of water. The cupro nickel regular heat exchanger can manage the flow and provides excellent resistance against protection and corrosion from pollution. It would work but i think that the flow is too low.