Answer Doug, You will want to check to make sure that the damper door at the top back of the refrigerator compartment to make sure that it is open. If it is then check to make sure that the evaporator fan motor is running in the freezer compartment. If they check ok then check the evaporator coils to see if there is impacted ice on the coils. If the damper door is closed then will be a issue of the damper being defective, if the fan is not running then would most likely be the fan is faulty and then if the coils are impacted with ice then this would be a defrost issue in which you will need to test the defrost heater and defrost thermostat for continuity. If there is continuity then the issue will be a faulty control board. Read More... Answered by AppliancePartsPros.com | Monday, August 28, 2017