Starlight frig 28 yrs old, kept freezing coil. Here is what has been done, tev changed possible flooding coil helped prevent freezing. Had a leak, but only when running , leaking out around wires on compressor, changed compressor. New lps on set at 30psi diff 10, should be freezing with those numbers. New filter and is full in sight glass. R-12 system. Cabinet 45 degrees and steady. Low pressure 30 to 17. Suction temp 75.1 and i side pressure 140 and temp is at 95.7. System is 1/4 hp, new compressor was 1/3. Pulled down to 450 microns and left set overnight. Cabinet needs to be around 37. Help, losing my shirt on this one. Was thinking I was as close to the book as possible, not sure what I have missed..