Arrived on site to perform heating tune up on a 1 year old unit. Client stated no issue as he just started using heater. Cycled on and is operational. Filter was supplied and replaced. Inspected blower compartment and electrical. Blower wheel is good. Motor is in range. Inducer motor is good and in range. All safety switches are operational. Flame sensor and igniter good. Drain lines are good and clear at this time. Temperature rise is good and in range. Found no protection on unit and recommended adding to protect from electrical surge and power outages. Cycled unit to ensure system operating. Wet over how unit is running and it’s condition. Client is aware he did declined recommendation at this time. Unit is operational upon departure.