I think you could hook up a set of gages in driveway and see if the PSI is too high, and in some cases I see that systems are overfilled.
Here is something that happened to me....
I had a new AC and Heating system put in my house in 2010 by a professional.
I had to use them, because It was a requirement to receive a rebate from the state, for using approved contractors through the electric utility.
So here is what happened.
They installed and I got my rebate, that made the cost for me less than if I did it myself.
The first issue.......AC no worky....call contractor.
Contractor came fast and changed the fuse with a higher than rated fuse and I documented.
AC worked again.
Two days later Fuse being too big blew board...he replaces board.
Turns out the relay outside was faulty.
China stink bugs went into the condenser outside, and nested in the high voltage relay for the compressor, due to no gasket, further blowing the fuse on the board.
When the relay pulled in, the bugs would get squashed, and the guts being conductive would complete circuits from the T stat wire, to the 220 V .......ahh oh.
Contractor says well this isn't our fault and under warranty.
Keep in mind I was documenting all.
I was like okay........ so the bugs got in there, because you negated installing a gasket; and now I'm responsible for the because you didn't do your job right.
I than opened the book from the AC install, and noted showing the gasket requirement, I then had a capitulated contractor.
2 years later it gets real hot like 102 record temps and the AC is not hitting targets inside with a short cycle.
Now it's out of warranty and I'm like okay, I have to get these new gages and the commercial Freon thinking maybe low.
So ordered the stuff and waited a couple days.......meanwhile waiting checked for leaks with detector found nothing.
Hook up gages and low and behold all is fine NFF @ about 80 , next day it's 100+ again and here is the short cycle.
Hook up gages and the high side was off the charts.........know why?
TO MUCH FREON ..............!
Remove and recover the overage and the AC is way colder........
I have found this situation on more than a handful of friends AC in their house, and almost believe that some contractors deliberately overfill to cause a service call later or system failure.
I have found the same in automotive over the years.
My policy in my shop was for the last 25 years to charge AC as a gratuity being a hero on a hot day.
So now I basically almost trust no one in their abilities anymore, until I have personally verified it or know them a really long time to establish a work ethic.