I have this refrigerator/freezer (side-by-side) in the garage for last two year and in home for last 10 years before that. In winter last year it's freezer stopped working, than in summer this year, it would sometime work and other times stop. Last week the refrigerator stopped cooling. If I play around with cooling setting the compressor starts running and refrigerator starts cooling again but after couple of day the same problem of not cooling returns unless I adjust cooling setting again to engage compressor. What could be the issue? Thanks