OEM Lennox Heat Exchanger Kit — 15M09

The genuine OEM Lennox 15M09 heat exchanger kit provides the complete assembly needed to restore safe, efficient heating in your Lennox gas furnace. The heat exchanger separates combustion gases from the conditioned air stream while transferring heat into your home, making it one of the most important safety and performance components in the entire system. Supplied as a factory kit, the 15M09 includes the components matched to Lennox specifications for a precise fit.

Common signs that your heat exchanger has failed include visible cracks or corrosion, an unstable or rollout burner flame, soot deposits, unusual odors during operation, elevated carbon monoxide readings, or nuisance shutdowns on the limit and flame-rollout switches. These symptoms indicate the exchanger can no longer contain combustion byproducts safely and should be addressed immediately.

Choosing the OEM Lennox 15M09 kit ensures every part meets factory tolerances for alloy, weld integrity, and thermal expansion. Generic replacements risk poor sealing, shortened service life, and potential warranty loss. This authorized Lennox kit restores rated efficiency and safe combustion so your furnace performs exactly as designed.