Remove the toe plate in front of the refrigerator, below the doors.
Check the coils under there to see if they need to be vacuumed out.
Also check the condenser fan in back near the compressor to see if it's running.
You may be able to see if the condenser fan motor running by looking through the condenser coils at the front of the refrigerator, but if it's dirty it would be a good idea to pull the refrigerator out and remove the back so you can vacuum it out back there too.
Your model uses condenser fan motor part # 215501901
Let us know what you find or if you have any more questions.