This assembly is built to withstand high thermal cycling

tight seal between the burner door and the combustion chamber

Integrating this kit into your water circulation system guarantees a robust mechanical interface and reliable fluid transmission

All-Weather Reliability: Built with robust internal components to handle the thermal demands of both heating and cooling cycles in vertical or horizontal configurations

Lennox 12P64 Molded Plug Harness 320819-301 This assembly is built toThe Lennox 12P64 Molded Plug Harness is a critical OEM replacement part designed to maintain terminal integrity in industrial HVAC applications. This molded plug harness features a high durability connector housing that prevents accidental disconnections caused by mechanical vibration or thermal expansion. Engineered for seamless integration with Lennox HVAC equipment, the 12P64 harness (previously identified as LEN104327 15 and LEN612490 04) ensures