Product review (5 stars): Why pay more? Easy fix.
I had a cold freezer and not-so-cold fridge. After extensive research on the internet, I narrowed it down to this part - well, most  likely this part. I was right. I got this one for just over ten bucks and it looks to be the same as the ones appliance stores offer for 60 to 70 bucks.

Replacing the timer was easy. Only two screws on mine - One screw on the temperature control cover and one screw on the defrost timer. Un-plug the old one and plug in the new one.