After two days, I called for a repair service because of a problem. For some reason, the refrigerator was not getting cold -- thermometer read 58 degrees.  Certified/Authorized repairman from Tunista came to fix the problem.  It appeared to be a manufacturer's defect where the cold air from the freezer was not able to get to the refrigerator section below.  Refrigerator is now working fine and temperature in the refrigerator maintains 37 degrees.