I knew cooling the main refrig section came from the freezer & the freezer was OK. I also knew there was a fan to move the air. I called a repair service & they said they would come in 3 days, then 7-20 days for ordering necessary parts. Appliance Parts Pros helped in determining it must be the the evaporator fan. I also noticed fan was making a noise. I ordered fan, 2 day shipping, & it was here early 2nd day, 2 days b4 service company was coming. The cost was less than the service call would have been. Took my time, kept screws in order & took about 1 1/2 hours. Not only saved a bundle & up & running over a week sooner than service company by over a week