The Amana-Goodman 2864604S Secondary Heat Exchanger is an essential OEM component designed for high-efficiency condensing furnaces. Engineered to extract latent heat from flue gases, this secondary condensing coil ensures the system maintains its AFUE rating by facilitating the phase change of water vapor into liquid condensate. Built with corrosion-resistant materials to withstand the acidic nature of condensate, this HVAC replacement heat exchanger is critical for restoring furnace performance and preventing combustion air pressure switch trips. This Goodman furnace part is specifically calibrated for compatibility with select multi-stage and variable-speed systems. Precise alignment of the heat exchanger cell structure is necessary during installation to ensure proper drainage and prevent premature scaling. For technicians performing a furnace heat exchanger replacement, this component provides the exact physical dimensions and thermal transfer characteristics required to meet original factory specifications and maintain safe internal cabinet temperatures. Key Technical Benefits OEM Compatibility: Precision-engineered for a seamless fit within specific Amana and Goodman furnace cabinets, eliminating field modifications. Enhanced Thermal Efficiency: Optimized fin density and internal tube diameter maximize heat recovery from exhaust stream. Condensate Management: Designed with a specific pitch to ensure rapid drainage, reducing the risk of biological growth or blockage. High-Grade Construction: Utilizes durable alloys capable of resisting the corrosive byproduct of high-efficiency combustion. System Pressure Balance: Maintains the exact static pressure requirements for secondary air-side performance as specified by the manufacturer. Common Technical Questions What are the signs that a secondary heat exchanger needs replacement? Technicians typically look for clogged fins, scale buildup, or a distinct "sulfur" odor. Common diagnostic indicators include high-limit trips or pressure switch faults caused by restricted flue gas flow through the secondary coil. Is the collector box included with the 2864604S? This part number refers to the heat exchanger assembly itself; technicians should verify if additional gaskets or the plastic collector box headers need to be ordered separately based on the specific furnace serial number. How can I prevent premature failure of this component? Ensuring the furnace is properly leveled and verifying that the condensate drain lines are clear and trapped correctly is vital to prevent acidic water from backing up into the heat exchanger cells. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing. This item is not eligible for free shipping.
