The Hayward Heat Exchanger Assembly (FDXLHXA1300) is the OEM replacement heat exchanger assembly for the Universal H-Series H300FD pool and spa heater.
IMPORTANT: PROFESSIONAL SERVICE REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.
The heat exchanger assembly is the core thermal transfer component of the H300FD heater, responsible for transferring combustion heat to the pool water circulating through the unit. Hayward's Universal H-Series heat exchangers are constructed with cupro nickel, providing resistance to salt water and chemical corrosion in demanding pool and spa environments.
Specifications
| Hayward Part Number |
FDXLHXA1300 |
| Compatible Heater Model |
H300FD (Universal H-Series) |
| UPC |
610377104579 |
Poolaroo Pro Tip
When replacing the heat exchanger assembly on an H300FD, have a licensed pool professional inspect all adjacent seals, headers, and manifold connections before reinstallation. Heater components operate under thermal cycling stress — replacing worn companion components at the same service visit reduces the likelihood of a repeat service call.
