Carrier 334357-754 Heat Exchanger

The Carrier 334357-754 Secondary Heat Exchanger is a critical OEM condensing component designed for high-efficiency gas furnaces across the Carrier, Bryant, and Payne product lines. This secondary coil is engineered to extract latent heat from combustion gases, maximizing thermal efficiency before exhaust. Technical specifications confirm a width of 24.5 inches, a depth of 25 inches, and a height of 12.5 inches. As a genuine Carrier replacement part, it is the direct solution for 40-inch tall condensing units, including 58MCB, 58MSA, 58MXA, and 58MVP model series.

For field technicians, this condensing heat exchanger kit is essential when addressing secondary heat exchanger failure, often identified by corrosion from acidic condensate or polypropylene coating breakdown. Replacing a failed furnace heat exchanger restores system pressure and prevents the rollout or inducer limit trips common in older 90% plus AFUE models. This HVAC secondary coil features a robust metal construction designed to withstand the highly corrosive environment of the condensing process. The assembly is a direct-fit replacement for previous part numbers including 330502-704, 330540-754, and 320722-754.

• OEM Compatibility: Engineered specifically for Carrier furnace repair, ensuring precise alignment with the primary cell inlet panel and coupling box.
• Efficiency Restoration: Restores the unit to peak AFUE ratings by facilitating optimal latent heat recovery during the combustion cycle.
• Corrosion Resistance: Specifically treated to handle the acidic condensate produced by high-efficiency gas combustion.
• Comprehensive Kit: Typically includes the heat exchanger assembly and necessary mounting hardware to streamline the swap-out process.

• How do I know if my secondary heat exchanger is failing? Look for signs of rust in the condensate trap, water leaking from the burner box, or consistent pressure switch faults. A visual breach or clogged secondary coil requires immediate replacement.
• Will this fit my specific furnace model? This 24.5-inch wide kit fits most 120,000 to 140,000 BTU models. Always verify the furnace model number on the rating plate against the 334357-754 compatibility list.
• Is the block-off plate included? This kit includes block-off plates compatible with 58MVC and 355CAV models. For other series like the 58UVB or 355BAV, you may need to transfer the existing plates as per the installation manual.

This item must ship via truck. Please contact us for freight quote.

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.