Hi ndntwiggy,
Ngafm at your service

Your said,your freezer is about 2 years old, but has been in storage for about a year and a half.
And the green light comes on, and the motor is running, but it will not get cold or even cool.

When a compressor is not run for more than a year, or 2 years there is a possibility that the seals dried out from non use and the freon leaked out.
Compressors have oil in them that when run even once a month will lubricate the seals and keep them soft and moist! .
Just like in the older cars from the 1960's or 70's the air conditioners had to be run once a month even in the winter to keep the seals lubricated or they lost the freon!
Then they started to make the defroster turn the compressor on as to lubricate the seals every time it rained or snowed and you needed the defrosters and this serviced the compressor as in todays cars.!
So you need service to fix it and more than likely it's out of freon refrigerant .
Let me know your end results.
ngafm
Please give me a good rating for my accurate advice,
before you sign out of our site.
thank You ngafm