I am MACS and IMACA certified, mobile refrigeration mechanic, fourty plus years and hundreds and possibly thousands of repairs. You all have good points. Do not forget the sight glass in the high side filter/drier/receiver, as well as the EPR valve can fool
you, pressure wise. The sight glass tells you what you need to know. Our Airtemp condensers will hold another pound if needed. The aftermarket units? Good luck!
From: Chrysler300@xxxxxxxxxxxxxxx <Chrysler300@xxxxxxxxxxxxxxx> on behalf of John Grady jkg@xxxxxxxxxxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx>
Sent: Thursday, August 24, 2017 4:34 PM
To: Ray Jones
Subject: Re: [Chrysler300] 300 G A/C
Just quickly, pressure readings do not tell you charge level, but I agree throwing in one can like that --if you know for sure low can fix it. If it is not low you can overcharge , = disaster . The only way to correctly charge is by weight of refrigerant and a scale -which they do in an empty system or first pull out what is in there with suction AC machine ( a law now) . Excess liquid refrigerant is kept in the car receiver / dryer tank , by design .
It is like a propane tank . Pressure is the same almost empty or full . Pressure is Set only by temp of propane ,or refrigerant not by how much is in tank .. for things that are liquid at room temp under pressure , but change to gas if pressure drops . Why gas comes out in your grill , not liquid . And flame stays about the same size ( same pressure) as the liquid tank empties on a hand held propane torch . And gets cold. Straight compressed gas ( oxygen) non liquified yes pressure tells you % full in cu ft .
Somewhere in FSM is weight in oz of new charge .. about 2 cans + usually. By way of understanding , not critique .
Sent from my iPhone
On Aug 24, 2017, at 5:08 PM, Ray Jones 1970hurst@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Posted by: RICK AND DEBBIE CLAPHAM <rixpac@xxxxxxx>
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