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post #1 of 10 (permalink) Old 06-15-2017, 08:33 PM Thread Starter
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A/C won't take charge- frustrated!

So I tried charging my A/C system today and the system just refuses to accept the refrigerant. It just sprays everywhere. Yes, I did pull back on the thing and made sure it was tight on the low pressure port. On that note, can someone please post a pic with an arrow pointing to the low pressure port, in case I have the wrong one? I'm 99% sure I have the right one since it's the only one that fits, but I don't know what could explain this. This is my first time doing this but it looked simple enough on youtube.
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post #2 of 10 (permalink) Old 06-15-2017, 08:45 PM
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A leak in the system and it's empty without a vacuum will prevent you from adding refrigerant.
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post #3 of 10 (permalink) Old 06-16-2017, 10:06 AM Thread Starter
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Wait, what? You mean I can't add refrigerant if it's completely empty?
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post #4 of 10 (permalink) Old 06-16-2017, 04:03 PM
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yep
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post #5 of 10 (permalink) Old 06-16-2017, 04:58 PM Thread Starter
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So what is the solution?
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post #6 of 10 (permalink) Old 06-16-2017, 05:28 PM
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Find the leak.
Replace leaking part(s).
Evacuate the system.
Add refrigerant/PAG Oil.

If you don't know what you're doing take it to a competent shop that deals with A/C.
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post #7 of 10 (permalink) Old 06-16-2017, 05:57 PM
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If I could jump in:

There could be two situations:

(1) The refrigerant leaked down to a low pressure, low enough for the pressure transducer to cause the PCM to prevent the compressor from coming on, but hasn't been leaking long enough to get down to zero pressure. *IF* that's the case, a new can of refrigerat will initially have more pressure than is in the system, and refrigerant will flow in, maybe enough to get above the low pressure lockout point and allow the compressor to turn on. If not enough pressure for the compressor to turn on, you can force it on by jumpering power to the compressor clutch so that it will pull more refrigerant from the can. It wouldn't take long to pressurize the system enough to where you can remove the jumper and the compressor would run based on the transducer seeing enough pressure to finish the job. You don't want to run it with the jumper connected with system fully charged or close to fully charged because it does periodically need to turn off when at full pressure.

(2) *IF* the system has a larger leak and/or has been allowed to leak all the way down, then you do not want to charge it up without first pulling a full vacuum on the system. That is because with it sitting at zero pressure, air and moisture will have infiltrated the system. Moisture is the number one enemy of the a.c. system. So if that is the case, you not only don't want to just charge it back up, you need to replace the receiver-drier, and then pull a vacuum and recharge.

In either case, you should put some PAG-46 oil into it to make up for some lost while leaking down. Maybe 1 to 1-1/2 ounces for scenario (1), and 1-1/2 to 2 ounces for scenario (2).

Of course, if it has a leak, that should be repaired. Also, whether or not the leak Is repaired, you should put some UV dye in the system so you can either find the point of the present leak, or in case of a future leak, find it.

I don't understand why it's spraying out at the connection unless your quick connect fitting or the port is damage (or the quick connect's o-ring is rotted or damaged). Nothing you've said so far explains the spraying at the port connection (unless as you said, you didn't have it fully pushed on).

Ron - If you disagree with anything I've said, let's discuss it. I could be wrong, or may have mis-understood something that was posted.

EDIT: Post nos. 4 thru 6 were posted while I was composing.


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Last edited by peva; 06-16-2017 at 05:59 PM.
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post #8 of 10 (permalink) Old 06-16-2017, 06:42 PM
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Without putting a set of gauges on it...who knows what the situation is.

Hence taking it to a shop.
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post #9 of 10 (permalink) Old 06-16-2017, 07:45 PM Thread Starter
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Ok guys, thanks for the help. Looks like I'll be paying somebody else to work on it. I thought I could charge the system myself and save some money since it looked so easy on youtube... I don't even know why I bother. [facepalm]
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post #10 of 10 (permalink) Old 06-16-2017, 08:29 PM
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Go watch some more YouBoob videos.
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