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Laku
New User
Aug 17, 2011, 12:41 PM
Post #1 of 7
(5994 views)
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High PSI readings
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1993
Chrysler Concorde
Not sure of engine size
190k miles
Hi everyone. I tried to recharge a car's ac system with R134A (freon) on the low pressure valve with the car's engine and ac running but the psi gauge keeps shooting dangerously high. I emptied the car's valve before I tried recharging it, but it still reads high after 10 seconds of charging it. I looked around and think the expansion valve might be stuck close because of the last (bottom) FAQ I saw on this page:
Link deleted..........not allowed
What do you guys think? Thanks!
(This post was edited by Hammer Time on Aug 17, 2011, 1:31 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 17, 2011, 12:59 PM
Post #2 of 7
(5980 views)
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Re: High PSI readings
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A/C diagnosis is not for the DIYer. You're going to do a lot more harm than good trying to use those death kits they sell you.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Laku
New User
Aug 17, 2011, 1:04 PM
Post #3 of 7
(5975 views)
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Re: High PSI readings
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I did it with my own car and it seemed to go smoothly. Is it that dangerous to recharge the A/C? I don't know a lot about cars but I've done some research on recharging. Seriously, if it's dangerous I'm gonna stop lol.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 17, 2011, 1:30 PM
Post #4 of 7
(5967 views)
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Re: High PSI readings
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A. Do it wrong or with wildly known inaccurate kits (cans w gauge) and you could blow it all up and freeze burn yourself, lose eyesight or worse. Never mind if you wreck the system you CAN hurt yourself,
T
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Laku
New User
Aug 17, 2011, 3:11 PM
Post #5 of 7
(5956 views)
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Re: High PSI readings
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wow, thanks for the head up lol
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 17, 2011, 5:18 PM
Post #6 of 7
(5949 views)
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Re: High PSI readings
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Seriously, even before you go shooting refrigerant, not Freon, into the system you have to know what the high and low side pressure readings are. An experienced AC tech can look at those pressure readings and get an idea what is going on in the system.
The main reasons it is dangerous is because you are working with high pressure and a substance that can cause major frost bite. AC is also very expensive to repair if something is done wrong.
Most of us that repair AC systems aren't licensed and trained for nothing.
Frost bite on the fingers. Imagine if you had a can blow up in your face.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Aug 17, 2011, 5:23 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 17, 2011, 5:23 PM
Post #7 of 7
(5946 views)
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Re: High PSI readings
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Just be safe and aware as best you can. Damn products care less and just try to sell them with wild claims of magic fixes and not fair IMO.
Wonder if product labeling said "Use of this product AYOR and can make thousands in extra expense to fix a problem" - how much would they sell? Hey, I'm a customer too for assorted crap and learned the hard way sometimes too much.
Good luck,
Tom
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