Thank you for this question Karen. Based on what you have provided, the problem is with the refrigerator temperature sensor. The sensor controls the damper located between the freezer and the fresh food section. Your refrigerator has a test function built into the main control board. Since there is not an error code showing on the control display the main board can be tested. This would require you getting access to the Main control board located on the rear of the refrigerator. From the main control board the fan motor could be forced into operation, by pressing the test button on the board. This allows you to verify the air flow to the fresh food section. Also from the Main control board if you feel comfortable working with and around voltage, you could test the sensor to the fresh food section. At this point you would know what was needed for parts and you could order them from this link:
Kenmore Refrigerator Model 795.71303012
I have sent you the test and the location of the test switch on the Main Control Board. To check the sensor you would need the unit unplugged from the wall and from the connector ohm the two white wires. Set the meter for 50k or higher. The reading you would look for is 6k to 7k ohms. If you have questions you would reply to the thread and I will help you.
If you get to the point where you need to have a service technician diagnose and repair this failure, you can schedule service through this link:
Sears Home Services