Unit is freezing on the outside at the bottom and fan is not runn

Hi! there,
occasionaly freezing on evaporator,severral factorcan be the cause since this is just almost two years,in this case if has no maintenance need to be clean your evaporator fin,debris ,dust particle obstruct the cooling effect blown by your blower fan,so freezing occured,this need maintenance perhaps they can check also the freon charge w/c is one of causes also,if under charge mostly freezing on lower bottom of evaporator occured,check if still on warranty date of purchased,call in on service center where you bought the unit or near service center of the branded name,if under charge you should ask the service man to find the leakage before recharging otherwise it will persist again the problem for a couple of day at time of warranty service,beside leak freon is bad for our enviromental athmosphere
this should be done promptly.cheers and have anice environment,don't forget to rate me,thank's