Lennox 56K26 Flue Box R-410A The internal spring design ensures

The internal spring design ensures a predictable fail-safe position upon loss of control pressure

this kit is specifically calibrated and listed for use with Reznor heating equipment

Double-check your motor shaft diameter to ensure a secure lock with the set screw

Contractor Grade: Simplifies HVAC troubleshooting by providing consistent switching points for draft verification

This often indicates a stuck-closed blower relay on the control board or a safety limit that has tripped and remains open

Lennox 56K26 Flue Box R-410A The internal spring design ensuresThe Lennox 56K26 Flue Box (also identified as LB 79560) is a critical OEM replacement part engineered for high efficiency gas furnaces and boilers. Constructed from corrosion resistant stainless steel, this collector box is designed to manage the transition of combustion byproducts, ensuring that exhaust gases are safely and effectively channeled from the heat exchanger into the venting system. For a veteran technician, the 56K26 represents a reliable