OEM Lennox Heat Exchanger Assembly — 28W31

The genuine OEM Lennox 28W31 heat exchanger assembly is the essential component that carries heat from your furnace's burners into the air distributed throughout your home, while keeping combustion gases sealed away from the conditioned airstream. Manufactured to exact Lennox specifications, the 28W31 provides the precise fit, dependable sealing, and heat-transfer efficiency required for safe furnace operation.

Indicators of a failing heat exchanger include visible cracks or rust, a burner flame that flickers or distorts when the blower engages, soot accumulation, unusual odors during heating, and recurring trips of the high-limit safety control. Since a cracked heat exchanger can introduce carbon monoxide into your home, any of these symptoms calls for immediate replacement.

Choosing an OEM Lennox 28W31 is critical for safety and long-term reliability. As a safety-rated component, the heat exchanger relies on exact material grade, weld integrity, and dimensional accuracy that only genuine Lennox parts guarantee. The authentic assembly ensures a proper model-specific fit, keeps your warranty intact, and restores the safe, efficient performance your Lennox furnace was engineered to deliver.