Automotive Air Conditioning Information Forum (Archives)

Briandl79 on Tue August 02, 2011 1:54 PM

Can you determine refrigerant levels based on pressures alone? In other words if my readings are whatever normal would be, let's say 35/250, is that enough to know I have the proper amount of refrigerant? How accurate would that be considered? Is it accurate to say 4 ounces, or dead on accurate?

Is the only true way to get an accurate idea of refrigerant level an evacuation and recharge with weighed refrigerant?

Just a general question. TIA!

Cussboy on Tue August 02, 2011 2:15 PM

Quote
Originally posted by: Briandl79
Is the only true way to get an accurate idea of refrigerant level an evacuation and recharge with weighed refrigerant?
Yes.

Quote
Originally posted by: Briandl79
Can you determine refrigerant levels based on pressures alone?
This can be a good indicator of approximate charge level, as well as the condition of the system. But for answer: see above.



Edited: Tue August 02, 2011 at 2:15 PM by Cussboy

GM Tech on Tue August 02, 2011 2:33 PM

You must weigh "out" the charge to know refrig amount

-------------------------
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......