replacing the mounting spacer tube is a standard best practice to restore factory-quiet operation and prevent premature wear on the fan assembly

ensuring zero-clearance mounting and terminal alignment

restoring original system performance

and using an incorrect pole count can result in unpowered elements or improper sequencing of the blower motor

The York S1-373-27868-405 Indoor Coil is a high-performance replacement evaporator coil engineered for precise fitment in 17-inch wide residential furnace and air handler cabinets

Carrier HK46EA123 Motor Module 340155-7024 replacing the mounting spacer tubeCarrier HK46EA123 Motor Module