OEM Lennox Heat Exchanger — 46K93

The genuine OEM Lennox 46K93 heat exchanger is the heart of your gas furnace's heating system. As combustion gases pass through its sealed chambers, the exchanger transfers heat to the circulating air while keeping toxic byproducts — including carbon monoxide — safely separated from your home's air supply. This heat exchanger is built to the exact specifications of Lennox furnaces that call for part number 46K93.

Common failure symptoms: A cracked or corroded 46K93 heat exchanger may reveal itself through visible rust or metal fatigue, a flickering or roll-out burner flame, unusual popping or rumbling sounds, soot accumulation, or a carbon monoxide detector alarm. Any suspected crack is a serious safety concern and warrants immediate replacement.

Why OEM matters: Heat exchangers must withstand repeated thermal expansion and contraction across thousands of heating cycles. The Lennox 46K93 is manufactured from the correct alloy and formed to precise tolerances so it seats properly within the furnace cabinet and maintains a gas-tight seal. Installing the OEM part protects both furnace efficiency and, more importantly, the safety of everyone in the home.