Iiyunithi zokunciphisa iifriji zizinto ezibalulekileyo kummandla weenkqubo zokupholisa kwemizi-mveliso. Badlala indima ebalulekileyo ekuguquleni igesi yefriji ibuyele kwimeko engamanzi emva kokuba ithathe ubushushu kwindalo esingqongileyo. Ngapha koko, ezi yunithi zinoxanduva lwenkqubo yokwala ubushushu, ebalulekileyo ekugcineni amaqondo obushushu asezantsi afunekayo kwizicelo ezahlukeneyo, ukusuka ekutyeni