guys, aside from cleaning the filter, is there anything I need to do to prevent ice buildup sa AC unit ko? I have a window type LG unit non inverter .75HP, wala pang 1 year. bigla nalang may tumunog na parang gumuho na ice build up sa loob then it started spitting out small ice once palang naman.

what are the things should I look for? may tama na ba to? or simple cleaning lang ang kelangan?