Well thinking back my first call on this unit over a week ago was a complaint that the unit was too noisy. The two straps had come loose on the suction line. Three mounting bolts had come loose on compressor. So I fixed these issues. It was shaking bad and making a lot of noise. A few days later I was called back because it quit running. Now I know why it was so noisy and vibrating excessively. Have no idea who my predecessors were.