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Re: Charging AC
Posted by Dean [Email] (more from Dean) on Mon, 21 Aug 2006 14:11:17
In Reply to: Charging AC, yaofeng, Mon, 21 Aug 2006 10:23:25
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You keep posting in this BB when you should be posting in a BB specific to your year/model... and you do not post what year?model?engine?miles that you are dealing with.
I do not recall any discussion of A/C service to that level on the BB's that I frequent. I expect that you might need to add refrigerant oil of the proper type/qty as well, but this may depend on the nature of your work and leak.
Do you have a new dryer?
Given model and year info, someone might come up with the mass of refrigerant to use... but a sticker under the hood should list that. Otherwise, what I would do is a low side pressure of 33-34 PSI on a hot day, with the AC on max cooling (both sides on a 9-5), max fan, recirc off, doors open. If there is a sight glass, on a NG900/9-3 there will be some bubbles in the fluid at that pressure. To not have bubbles would be an overcharge of perhaps 44 PSI with greatly reduced cooling.
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