Completed a/c maintenance on 4 Mitsubishi ductless heads with 2 outdoor condensers. Chemically cleaned all coils on both indoor and outdoor units. Inspected all blower motors and blower wheels. cleaned and washed all washable filters. Inspected and tighten all electrical connections on both indoor and outdoor units. Checked all operations on all units in heating mode and checked supply temperatures. . All units are operating properly at this time a/c maintenance is completed