Arrived on site to perform fall tune up on a 2014 Lennox system. Furnace and evaporator coil located in attic client stated no issues. Just wanted to ensure drain lines where flushed. Cycled thermostat and good. Filter dirty due to recent fires recommended replacing. Fund new flex ducting used and insulation good. Blower assembly and wheel has slight dirt accumulating. Blower motor is good and amp drawls are in range. Heat exchanger good. Evaporator coil good slight debris. Blew drain lines out twice to ensure drain lines were flushed. Advised Drain lines Do have some dirt and debris accumulating due to the amount of dirt that has entered system. Secondary drain is rusted up from when system drain lines were clogged up and over flowed in past. Safety switches are all good. Voltage at furnace is 122v. no protection on either unit. Recommended adding surge protectors to prevent system from getting damaged or shorted out from electrical surges and power outages that can damage or short sy