Hayward FD Integrated Control Board Replacement Kit for H‑Series Heaters — FDXLICB1930, Direct‑Fit, Factory‑Matched

The Hayward FDXLICB1930 is an integrated control board replacement kit engineered to restore control functions on select Hayward Universal H‑Series low‑NOx pool heaters.

If your H‑Series heater is showing control faults or has a damaged electronics module, this FD integrated control board kit provides a direct-fit replacement designed for quick swap‑out and reliable operation. The kit is compatible with multiple H‑Series models and matches Hayward’s factory specifications, helping technicians and pool owners return a heater to service with minimal downtime.

Which Hayward H‑Series models does this control board fit?

This replacement board is intended for the Universal H‑Series low‑NOx heaters. It directly fits H250FDN and H250FDP, and is also compatible with H300FDN, H300FDP, H350FDN, H350FDP, H400FDN, and H400FDP variants. Using a matched control board helps maintain original control logic and sensor connections.

• Direct compatibility with listed H‑Series models
• Designed to match Hayward factory wiring and connectors
• Simplifies repair by avoiding custom wiring or adapters

How does installing this kit affect heater performance and maintenance?

Replacing a faulty control board restores the heater’s communication with sensors, ignition, and safety interlocks, so the unit can operate as intended. The kit does not alter heat exchanger performance or emissions; it simply replaces the electronic control element to resume normal operation.

• Re-establishes control of ignition, temperature sensing, and safety shutdowns
• Helps reduce downtime by using a factory‑matched board
• Requires standard technician tools and basic electrical troubleshooting

What are the practical installation considerations and physical specs?

The board is compact, measuring approximately 7.82 x 5.31 x 5.471 inches, and mounts inside the heater control compartment using the original fasteners and connector positions. Technicians should isolate power, verify model compatibility, and follow Hayward wiring diagrams to ensure a safe, code‑compliant replacement.

• Dimensions: 7.82 x 5.31 x 5.471 in — fits original control cavity
• Plug‑in connectors match factory harnesses for easier swap
• Power must be disconnected and proper grounding observed during install

What other system components and features should I know about?

The FD integrated control board pairs with Hayward’s H‑Series design, which includes a Cupro‑Nickel heat exchanger, 2 x 2-1/2 inch CPVC union plumbing, and a patented flow header to maintain even velocity across tubes. Those heater hardware features remain unchanged; the control board simply restores the electronic interface that manages them.

• Works with H‑Series Cupro‑Nickel heat exchanger and CPVC unions
• Maintains original low‑NOx emission operation when reinstalled correctly
• Supports existing sensors, ignition components, and pump control logic

Who this is for: technicians, pool service professionals, and experienced DIYers responsible for maintaining Hayward Universal H‑Series low‑NOx pool heaters will find this Hayward FDXLICB1930 control board kit useful for reliable, OEM‑matched repairs. It’s especially relevant when restoring heater control functions quickly and preserving factory wiring and safety features.