Hayward FDXLHXA1400 Heat Exchanger Assembly – Replacement for H400FD Universal H-Series Heater

Key Features

• OEM Hayward Replacement: Genuine factory heat exchanger assembly for the H400FD Universal H-Series heater.
• High-Efficiency Cupro-Nickel Construction: Delivers superior thermal performance and corrosion resistance, even in saltwater pools.
• Restores Full Heating Capacity: Ideal solution for replacing leaking or damaged heat exchangers to regain 400,000 BTU output.
• Engineered for Fit & Performance: Precision-matched to Hayward’s combustion chamber and header assembly — no retrofitting required.
• Trusted for Harsh Environments: Built for maximum durability in high-flow, high-heat, and chemical-exposed conditions.

Product Overview

The Hayward FDXLHXA1400 Heat Exchanger Assembly is the genuine replacement part for Hayward Universal H-Series H400FD pool and spa heaters. Constructed from high-performance cupro-nickel, this OEM exchanger resists corrosion from salt and chemical exposure while delivering fast, efficient heat transfer. Whether you’re servicing a leaking exchanger or restoring your unit’s full capacity, this assembly ensures safe, long-term operation and full compatibility with your Hayward heater system.

Specifications

• Part Number: FDXLHXA1400
• BTU Capacity: 400,000 BTU
• Heater Compatibility: Hayward H400FD (Universal H-Series)
• Material: Cupro-Nickel Tube Bundle
• Includes: Integrated manifold, gaskets, mounting hardware
• Connections: Factory pre-assembled for drop-in replacement

What’s Included

• Complete FDXLHXA1400 Heat Exchanger Assembly
• Factory-installed tube bundle and manifold
• Gaskets and mounting hardware
• *Does not include heater body or control board

Why Buy From Best Buy Pool Supply?

• Authorized Hayward Dealer
• Fast shipping
• Expert technical support to confirm part compatibility

Shipping & Returns

• Shipping: Ships in 1–2 business days
• Returns: 30-day return policy for unopened, unused parts

Need Help Identifying Your Heater Model?

Call us at (800) 877-1268 or contact us here — our support team will help ensure this is the correct heat exchanger for your Hayward Universal H-Series unit.