Completed 4 system preventative maintenance. Inside; checked all electrical connections, amp draw, and capacitance on all motors, changed filters on all systems including an April air 610, 16x25x1 (x2), 14x25x1. Cleaned out all condensation lines and pumps. Outdoor; Checked all electrical connections, amp draw and capacitance on all motors, cleaned off condenser coils and checked all refrigerant pressures. Found a dead compressor in the unit supplying the left side of the house, set up a consultation for Tuesday 4-7-20 at 12pm to look at replacement of the system