Generally, the refrigerant interface of the freezer is on the compressor. There is a copper pipe protruding from the compressor, and there is a check valve at the top of the copper pipe, which is the refrigerant interface. When we add refrigerant, we should pay attention not to add too much.
Now most freezers use refrigerant to achieve refrigeration effect, so we need to add refrigerant to the freezer regularly to prevent the freezer from losing refrigeration effect. However, when many people want to add refrigerant themselves, they can't find its interface.
Generally, the refrigerant interface of the freezer is on the compressor. If we see a copper pipe protruding from the compressor, and there is a check valve at the top of the copper pipe, it is the refrigerant interface.
However, we should pay attention when adding refrigerant. If we add too much refrigerant, it will affect the refrigeration effect of the freezer. If you don't master the method of adding refrigerant, you'd better ask a professional to add it, otherwise you may damage the freezer if you try it rashly.