Refrigerator does not cool.

Ok , I'll help you .
Pull the refrig out from the wall , and unplug . Remove the 8 " X 10 " panel on the back of the refrig . Inside this panel , is the main control board .
Remove the blue plug with 3 larger wires going to it . Looking at the plug , you will see : wire1 , wire2 , space , wire3 . Get a short piece of insulated wire , and remove about 1/4 inch of insulation , from both ends . Insert 1 end of the wire , into the slot of wire2 , and the other end , into wire3 .
Plug the refrig back in .
After about 2 min , look inside the freezer , behind the bottom crisper , and look for a red glow . This glow , is the defrost heater .
If no glow , this is an indication of a shorted defrost heater , or bad defrost thermostat , both of which are located behind the rear freezer panel . Unplug the refrig , and reinstall the blue connector , and the 8 x 10 panel .
The pt # for the heater is WR51X10101 , and the part number for the defrost bimetal is WR50X10068 . Both should be replaced . The heater is at the bottom of the coils , held on by 2 screws , and the thermostat , is clipped on the top right of the coils , with a blue and pink wire going to it .
If you do see a red glow , reasemble as above , and remove the rear inside freezer panel . At the top of the coils , on the left , you will see 2 white wires attached to a 1 " piece , which is clipped to the coils . This piece is the # 4 thermistor ( evaporator thermistor ) . Pt # WR55X10025 . Also replace the # 5 thermistor , ( freezer thermistor ) which is at the bottom of the panel , slid into a holder , also with 2 white wires going to it . Both thermistors , sent readings of temp , by coldness resistance , to the main control board , which then decides if it needs to defrost , or cycle off due to coldness reached .

check the return air ducts they will ice up and air will not circulate