It isnt limited to cars, we have people assert their HVAC knowledge dominance via a mini split by just claiming its running amps.
same people say that new model mini split dont need vacuuming before opening the king valves, claiming vacuuming was only required in the olden days. Upon further explanation demand , their reply starts with “company ac tech said” and in the miiddle you learn that the “proofing charge” of 1 psi nitrogen is apparently a replacement of vacuuming as its a “special wali gess”
Somewhere in the mid you may hear purging, and when asked how much do we purge, you get deer in headlights look then a ton of cussing follows.
All for just not using the right tooling and trying to prove that the “system is wrong”
🤣🤣🤣