Arrived on site to perform spring tune up on a 2018 lennox unit. Condenser located in back yard. Furnace and Evaporator coil located in attic. Client so stated no issues as system is now operational as they had issues in past with communication. Cycled unit and was operational. Washed condenser and cleaned off condenser coil inside and out. All control boards are all good. Primary is good and fan motor is good and in range. Compressor fan motor is good and in range. System is cooling home good at 20 degrees. Inspected indoor unit. Filter is okay still has about a month or 2 left. Son is not primary decision maker he stated to leave as is and they would get it replaced next visit. System is cooling at 20 degrees and drain lines are clear and draining. No protection on high efficient communicating unit. Would recommend adding surge protectors to system to protect from electrical surge and power outages that can damage or even short out systems and components. Went over all findings and r