My frigidaire was working fine awhile ago, I just open the freeze door to fridge and I took out a bag with meat and the bag apparently turned the nob in the freezer, cause the bag was all the way to the back and I just pulled it and all of a sudden I'm not hearing the sound I was hearing when I open the door an the cold air stop blowing. I turned back the nob to cold, nothing happened. I turned the nob to colder and nothing is happening... I open the fridge at the bottom to see if I hear anything.. But I'm not hearing nothing.. The landlord bought the fridge about 1 year now.. What can I do.. To fix the problem... Cause it was working before ?

Call your landlord... its their responsibility to have fixed. A fridge can fail when it's a only a week old... or work for 50 years. My mom has one that's older than that in her basement... it has the mechanical latch on it... back before they outlawed them. Because of kids locking themselves inside... It still works like new. And I know its OLDER than 50 years (because I'm 50) and its been powered up and running (and in use) as long as I can remember.

Check under the unit to see if it's clean. If not, clean it well and it should work.

One other thing is to make sure the fan is working. Without the fan the refrigerator part will not work. You may have closed louver that goes to the refrigerator part and you need to open it back up again.