Arrived on site to perform fall tune up on a 2017 lennox unit located on n garage. Client stated no issues and is good. Cycled heater and was operational. Filter was dirty and client stated they would order there own and replace once it got here. We and assembly dusty due to area and dirt entering unit. Motor is good and in range of amps. Yeah inducer motor. Is good and in range as well. Temperature rise is good and heating home. All safety switches are operational. Drain lines are clear and dusty. No protection for n unit and highly recommended adding surge protectors on unit to protect from electrical surge and power outages that can damage or even short out systems and components. Cycled unit and went over findings with client recommendations. He is aware but did hold off for now but did want to renew esa. He would let us know when he’s ready. Cycled unit to ensure system operating. System is operational upon departure.