Hayward SMX24024864 Heat Exchanger Replacement for Heat Pumps

This is the genuine Hayward replacement heat exchanger, part number SMX24024864, for the HP21404T pool heat pump. The heat exchanger is the component where pool water absorbs heat from the refrigerant, and it is the part most affected by water chemistry over the life of the unit.

Before you order

Match the model on your heat pump data plate to HP21404T. Because the exchanger is part of the sealed refrigerant circuit, replacement involves recovering and recharging refrigerant and should be done by a licensed technician. Confirm the diagnosis with them before buying, since a heating fault can also come from the compressor, the reversing valve or a control fault.