Arrived onsite for ac maintenance on 1 units. Asked customer to turn AC on to confirm operation. Checked all electrical. Chemically Cleaned outside unit, removed debris, cleared drainage holes. Observed a rusting in the outside condenser, measured pressures for R22 at 48/120psi with 17 degree sub cooling with outside temperature at 60degrees. Observed the suction line icing up. Cleaned evaporator coil and blew out condensate line. Observed significant rusting on the evaporator coil. Observed more icing on the inside coil. Recommend upgrading the system based on age and condition of the system.
