might well be a slight overcharge. need to chk. sub-cooling/superheat whichever applies.
decades ago on cap tubes (not just me a lottttt of old time goooooood techs) would charge to operating temp, and let it frost to within 6 inches of comp just at shut off point
Worked well for me for many years. Not saying it is the super hi tech way but will definetly get u to 3rd base.
Like i said decades ago. and small boxes only.
If you really know how it works, you have an execellent chance of fixin' er up!
Tomorrow is promised to no one...