Ge refer not blowing cold

Question

GE TBX 23Z refer has been working fine. moved it to assist in tile install. place back, olugged in starts to blow cool then after 2 hrs it blows room temp. It is clean dust free in under carriage and has plenty of air space. Fan blows very strong. I do hear a click and then 2 -4 seconds later another click. This continues every couple minutes. Sounds like poss the compressor is trying to engage? Not sure? It is older but a very nice unit and blows well, any ideas?