Never brag about your refrigerator !

Several weeks ago I was on here bragging about how good my refrigerator was working . Big mistake ! Now it will run at zero for a couple of days and then shut down for several days . It does the same on electric or propane as well as ' auto '.. I can shut the switch to off , wait a day , turn it back on ,and it will start working OK for several days !
Where do I look ? Norcold about three years use .