Another dumb question

[Wildcard]

(06-17-2021 )tree98 Wrote:  And how do you "measure microns" ?

You need a digital vacuum gauge or micron gauge, specifically used for evacuation. It can also be converted from "s to microns for example 29" is about 23k microns and 29.91 is the industry standard of 400 microns. However if you not using digital gauges or a specific vacuum gauge your not reading this on a standard needle gauge manifold set. If you are, look at your low side gauge and tell me if you can accurately tell me the difference between 29" and 30" on that gauge.

All this can mean the difference of it cooled last summer but needs refrigerant, compressor or expansion valve next summer -OR- it lasts reliably for years to come.

It really amazes me as an Industrial HVAC tech that the auto industry has such poor craftsmanship and standards. That was not aimed at anyone in here by the way. Just trying to help better ourselves.