Ultimate Cooling Tune-Up Ductless Mini Split (includes (1) power head): Serviced and inspected ductless mini split system checking system electrical, safeties, controls to manufacturer specifications. All systems temperature differences are within range between 20° and 24°. Cleaned all the filter filters.and drains on air handlers. The two air handler filters must be replaced as they are pretty plugged. No issues found everything is working as designed