Re: Adler Barbour CU-100 short cycling
As Bene said the fridge is probably freezing up because it's low on Freon. If that's the case a new compressor will only help if that removes the leak. If the previous guy put in more Freon, it could have taken some time for the Freon to leak sufficiently to start short cycling again.
The fact that your fridge ran properly seems to indicate that the compressor is also working properly further indicating a leak.
First step would be to contact the refer tech and find out what he did. If he did indeed at Freon then for sure you have a leak. It's a closed system so Freon can only escape via a leak.
Then the leak has to be located and repaired.