A grocery store owner in Georgia does a daily inspection of all refrigerated and frozen case temperatures using a laptop computer with specialized commercial software. The store owner notices that the temperature in a frozen food reach-in case has been above normal and will not pull down below 15°F. The case temperature is 20° at the present inspection, but ideally it should be between minus 10° and 0°. Customers have been complaining of warm products in this same glass door reach-in freezer for about a week.
The store owner then proceeds downstairs where the condensing units are located. The computer software also shows that the compressor for the glass-door freezer seems to have a constant run time. The store owner decides that a service technician should be called in to remedy the problem.