Hi thanks for choosing just answer, do you have the model number?
Alright looks like you got a bad damper assembly, pretty common on these models.
It comes as one big assembly
How to I repair it and were is it located? How difficult is it to repair? What tools do I need?
Just a long 1/4" nut driver is all you need if you look in the refrigerator side there should be a long white looking box along the top left side, that has air vents towards the very back you just replace that whole piece.
The piece usually around $100
Sorry actually might be closer to 200
thank you, XXXXX XXXXX if its worth repairing a 12 year old frig with a 200 dollar part. Thanks again for your time