Arrived on site to perform fall tune up on a 1999 American standard system. Furnace located in garage. Client stated he did not want attic and ducting inspected advised it’s part of tune up and ask it’s fine not to checked duct work. Filter was dirty and replaced client supplied his own. Blower assembly and wheel dirty creating stress on motor. Recommend cleaning assembly to reduce stress and high amp on motor. Motor is leaking oil from over working And pulling 8 amps when max rated at 12. Indicating Motor has Indefinite wear and could fail in future. Recommend replacing blower motor to extend life of system. Heat exchanger has heat impingement at this time no cracks found. Found igniter really low on rang and could fail in future. Safety flames sensor is Oxidized and has burnt spots from self wear over past years of operation. Could fail due to condition it’s currently in. Recommend replacing flame sensor and igniter to prevent heat not operating properly. Evaporator coil good