Arrived on site to perform heating tune up on a American standard. Client stated no issues and all is good. She been having remodel going on in home and stated she wee be replacing once it’s all done. Cycled and is good. Filter is dusty due to remodel. Blower assembly dusty. Motor is good and in range. Inducer motor is in range. Temperature rise is heating home good. All safety switches are operational. Drain lines are clear at this time but advised are Dusty from past years. No protection on unit and recommended. Cycled unit and unit is operating. Went over how unit is running client is aware at this time. Unit is operational upon departure