Freezer taking too long to cool or freezer not cooling?

The problem is weak compressor.The refrigerant in the compressor is got low.The compressor is weak.The compressor needs to be replaced.-------------- The working procedure of this unit is as follows: --- The compressor starts then it cools the freezer section. When the freezer reaches its cooling level the defrost cycle starts functioning. In this cycle the fan in the freezer section starts running and the cool air in the freezer section is passed to the fridge section and the fridge section gets cold. The air from freezer to refrigerator passes from the section, in that section the damper is located.------------ But as you mentioned that freezer not cooling this indicates problem with compressor.When compressor cools the freezer section then fridge section gets cold.If freezer section is not getting properly cold then fridge section will not cool properly/.So the problem relates to compressor.---------- In the compressor there is a refrigerant called FREON.With the help of this Freon the compressor cools the freezer section.Freon is a gaseous type cooling agent.The compressor will stop cooling when coolant gets leaked from its chamber.--------- Again recharging the Freon is possible, but the cost for that recharging is approx the cost of new compressor.So its always advisable to get compressor replaced.Because new compressor has warranty for few years.------------------ You can get required parts from from online sites like: --- www.repairclinic.com or from searspartsdirect online site. --------- This should help.Thanks.Helpmech.