Actually, the "Beer Can Cold" works like a champ 95% of the time.
The hvac girls are saying that only a hack would use it, but they've
probably reached down a few times and grapped the evaporator line on
the condenser to see if it was beer can cold and then made a mental
note that the system is properly charged. It is so damn easy and so
accurate. That's why you should use it first, if you want to know
the condition of your system.
Besides, we are not talking about hvac girls here. We are talking
about customers. Customers who have been screwed by the professional
hvac girls too many times and have seen them on TV hidden cameras
screwing other people.
It's pretty simple to use really.
Beer can cold is only accurate if your outdoor conditions never change
AND your indoor conditions never change. I have never seen a place
like that but I must assume that you live in one or you would not
recommend such a procedure. If you think I am wrong, ask the people
that make the equipment. They recommend suction superheat or liquid
subcooling. Just ask Lennox, Trane, Carrier, Goodman, York,
Rheem/Ruud, Heil and others. All are providing charging charts based
on something besides "Beer Can Cold".
If the Air Force did things your way, they would still be flying
biplanes with cloth covered wings. Come join the 21st century.
Yes, there are some dishonest HVAC folks out there. I put them in the
same boat as the incompetent ones. None of them are doing their
customers or our industry any favors.
about the hacks you see being busted on TV. If I show up at your
house and you have a leak, its fixed period. End of discussion. If
you want to do it any other way call some one else. If I can't
install a refrigeration component without it leaking, I should be
looking for another line of work. The real professionals are telling
you what a Hack is. Listen and learn so when they show up at your
door step you can spot them and send them packing before they cost
you. Some damage that they do, does not show up for months after
ward. In example: continuously running you AC low on refrigerant.
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