The Marley Engineered Products 3900-2033-000 Motor is a high-performance 1/8 HP replacement fan motor specifically engineered for Marley

Simplified Service: Operates as a reliable fixed orifice

By installing a Lochinvar OEM part

This precise logic prevents simultaneous heating and cooling in dual-duct or multizone systems

As a DPST heating thermostat

Lennox 49H47 Shaft THPU32HP7Y The Marley Engineered Products 3900-2033-000The Lennox 49H47 Shaft is a critical mechanical component designed for high performance air handling and blower assemblies. Engineered to precise specifications, this replacement blower shaft features a 1 3 16" diameter and a total length of 27 3 8 inches, ensuring exact fitment and dynamic stability within the drive train. Constructed from high tensile steel, it is built to withstand the rotational torque and radial loads typical of commercial HVAC