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The genuine OEM Lennox 93W29 heat exchanger assembly (also referenced as R42510006) is the primary heat-transfer component in your Lennox gas furnace. As combustion gases pass through its channels, heat is transferred to the blower air stream while flue byproducts stay fully contained — delivering warm, safe air throughout your home. Manufactured to Lennox factory tolerances for a precise, reliable fit.
Common failure symptoms: Watch for cracked or corroded exchanger surfaces, a wavering or lifting burner flame, short-cycling on the high-limit switch, and rust or soot around the heat exchanger. Carbon monoxide detector activation or a burnt smell during heating cycles are serious signs the exchanger has breached and needs immediate replacement.
Why OEM matters: Because this part separates combustion gases from breathable air, only a factory-original exchanger should be installed. Genuine Lennox 93W29 ensures correct alloy composition, sealed welds, and exact mounting geometry — protecting your household and preserving your Lennox warranty. In stock and ships same day before 3PM CST.