Came out on a one system maintenance Checked temp split checked coils cleaned outdoor coil checked run capacitors checked contactors checked pressures checked duct work checked blades checked bearings changed 20x20x1 filter Found Burnt and pitted contactor 1 1/2 pole (the more burnt and pitted part gets either will get stuck on and cause issues to motor and compressor or may not touch and at that point won't allow power to condenser for unit to come on at all.) Restriction in txv in all style coil (a restriction in the metering device for the refrigerant causing pressure to be out of specs and unit to not cool properly more restricted it gets over time will cause evap coil to freeze up and pop a leak also cause damages to blower motor possibly.) [Pressures 120-540 at starts got to 115-399 before left.] No plenums on unit (unit not having plenums on it causes for improper air movement/distribution) No surge protection No IAQ (air purifier) Quoting out supply plenum / evap coil 410a