Is this part required for all CC5AXA series air handlers

Manual Override: Features an external push-button manual gear release to simplify installation

and necessary gaskets or spacers to complete a professional service overhaul

industrial-strength materials designed to withstand the thermal stresses and vibrations typical of high-performance heating and cooling services

making it suitable for standard refrigeration cycles

Resideo AT140B1016 Transformer 318423-701 Is this part required forThe Resideo AT140B1016 is a heavy duty, foot mounted HVAC control transformer engineered to provide steady low voltage power for demanding residential and light commercial applications. This unit efficiently steps down 120V primary power to a 24V secondary output, making it a critical component for powering thermostats, gas valves, relays, and integrated furnace kernels. Rated at 40 VA, it offers more than enough overhead for modern multi stage