Arrived onsite for ac maintenance on 1 system. Asked customer to turn AC on to confirm operation. Checked all electrical. Chemically Cleaned outside could, measured pressures for R22 at 59/135psi with 6 degree sub cooling with outside temperature at 65 degrees. Measured temperature drop at 15 degrees. Cleaned evaporator coil and condensate line. Performed efficiency test utilizing MeasureQuick. System running but not well; received a grade of “D” Homeowner will look into upgrading system next year
