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612998-02 assy heat exch (610280-04)

Heat exchanger pressure test kit

Heat exchanger

Heat exchanger
Ensure the longevity and efficiency of your Lennox furnace with genuine OEM heat exchanger parts from Repair Clinic. Our selection of high-quality Lennox heat exchangers is designed to address common furnace issues such as poor heating efficiency and unusual noise. Whether you're a DIY enthusiast or a professional service technician, you'll find the right parts to restore your furnace to optimal performance. Lennox furnaces are known for their reliability, and using certified replacement parts will maintain this reputation. Browse our comprehensive range of Lennox furnace parts to keep your heating system running smoothly. Repair Clinic is committed to providing homeowners and professionals with the best repair resources, ensuring peace of mind with every repair.
Ensure your Lennox furnace operates efficiently by replacing a faulty heat exchanger with genuine parts from Repair Clinic. Issues such as a cracked or clogged heat exchanger can lead to dangerous fumes and compromised heating efficiency. With Repair Clinic, you can order replacement heat exchangers by 9:00 PM ET and benefit from same-day shipping, ensuring your furnace is up and running in no time. Our inventory includes genuine Lennox parts to maintain your furnace's reliability and performance. For HVAC professionals and DIY enthusiasts, Repair Clinic offers a reliable experience with a vast selection of furnace replacement parts, detailed repair resources, and customer support. Stay warm and safe by addressing common furnace issues promptly with parts from Repair Clinic. For more HVAC parts, visit our Heating & Cooling Partspage.


Experience hassle-free shopping for Lennox furnace heat exchanger parts with Repair Clinic's online store. We offer a Price Match Guarantee, ensuring you never pay more for genuine OEM replacement parts. Enjoy peace of mind with our No-Hassle 365-Day Returns, allowing you to return uninstalled items for any reason within a year. Easily locate the exact part you need by using our convenient lookup tool, which allows you to search by model or part number. Benefit from same-day shipping on in-stock items by ordering before 9:00 PM ET, getting your furnace back up and running quickly. Whether you're dealing with a faulty heat exchanger or simply conducting maintenance, Repair Clinic has you covered with top-quality Lennox furnace parts.
On Lennox furnaces, look for the model number on the blower compartment door, inside the front access panel, or near the gas valve. The rating plate may also list the serial number, so identify the model number carefully before searching. Enter that number in the search bar to narrow the complete Lennox furnace parts catalog to parts made for your specific unit, not just one repair category. Matching the model first helps account for differences between furnace series and production versions, making it easier to select the correct parts and repair information. It is the quickest way to be sure the part fits before you order.

Whether you are new to appliance repair or a seasoned technician, Lennox Furnace repairs go smoother with the right online resources. Troubleshooting videos, common-symptom articles, part testing guides, and wiring diagrams cover the diagnostic and installation steps. Use the model number lookup to confirm the exact OEM part for your unit, then follow the matching video from start to finish.

A furnace that fails to ignite can leave your home in the cold. Common issues include a faulty igniter, malfunctioning flame sensor, or a defective draft inducer fan motor. Replacing furnace filters and cleaning furnace parts can help prevent these problems.

Learn why your furnace isn't working by understanding its ignition sequence and identifying common faulty parts like the igniter, flame sensor, or control board. This article provides practical repair tips and insights into each part's role in the heating process.

A gas furnace that starts and then stops unexpectedly can be frustrating, especially during cold weather. This article explains five common causes, including issues with the flame sensor, pressure switch, control board, draft inducer fan motor, or air flow. Learn how each cause may impact your furnace's operation and get tips to resolve the problem.