Problem of internal humidity freezers and refrigerators how to solve?

Any hermetic system that is operating with internal moisture does not have a satisfactory yield. In these cases, the internal moisture of the pipes must be removed before the gas load is applied. To do this, proceed as follows: / a / initially, open the sealed system, removing the filter drier and refrigerant; / B / clean the entire system with a nitrogen jet, use R-141b with nitrogen for internal cleaning; / C / replace the dryer filter with a new and original; / D / make vacuum in the system; And / / to refill the refrigerant in the sealed system. Under no circumstances should methyl alcohol be used, as it contains a lot of moisture that is lodged in the inner walls of the copper tube. If even so the low performance persists there may be some leakage in the welds or in the copper tubes clogging the evaporator. In this case, the evaporator should be replaced and the above procedure repeated.