Arrived onsite for ac maintenance on 1 system. Asked customer to turn AC on to confirm operation. Checked all electrical. Chemically Cleaned outside coils, measured pressures for 410a at 116/226psi with 7.5 degree sub cooling with outside temperature at 67 degrees. Measured temperature drop at 15 degrees. Cleaned evaporator coil and condensate line. Performed efficiency test utilizing MeasureQuick. System running but only received a “c” grade due to age and air flow issues from the furnace.
