Thanks for your reply. How will I know if the timer is busted ? When I first noticed this issue, my products inside the freezer was all thawed & pretty much at room temperature. So I figured the unit did not come off the defrost cycle. Can you please list some of the check's I need to do to isolate and change the right part. Thanks in advance for your help.

I have a Frigidaire Model LFFU1153DW2 unit. It's 4 yrs old. Noticed its not working. I turned it off completely and turned it back on. The unit comes on, but don't hear the compressor turning on. I pulled the freezer out to look at the back of the unit. I heard some clicking noise around the left of compressor (around defrost timer), so I turned a few clicks on the defrost timer. The compressor comes on. At this time is my unit on defrost timer ? did I turn on the defrost timer manually ? is my defrost timer bad ? or is it any other issue. Note: My wife had the freezer full, so full that the door will not shut. Is the overload sensor busted ? please help which part I need to replace. thx