As all y'all know, I'm just a talented amateur and while I've been doing prep work on my own, I've had my local, certified, experienced, licensed hvac professionals do the serious stuff.
(all two of them in my area...)
In other words, I just know enough to be dangerous.
which gets me to my question:
Whenever a central unit is installed/serviced, the tech draws down a hard vacuum and keeps it evacuated for a couple of days.
When I've had my car's a/c serviced, they simply evacuate it, do some magic (which in one case required a compressor replacement [a known issue with that unit]), recharge the system, charge me plenty... and send me on my way.
This seems to be the standard time frame in cars.
Would slowing the clock down and keeping the vacuum in place longer make any difference?
Thanks.