Overcharged AC System! Oh boy - Drive Accord Honda Forums | radio-pro.ru
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post #1 of 6 Old 09-05-2014, 02:13 PM Thread Starter
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Overcharged AC System! Oh boy

Hey everyone, I want to start by saying that I've spent many hours searching around trying to diagnose the problem on my own, and I only post here as a last resort. I've been a long time lurker of this forum, and usually I can find the solutions, but I'm stuck on this one!

Car Specs: 2004 Honda Accord, 4 door, 4 cylinder 140,xxx miles.

Story of what has happened so far (can probably skip):

Ok, so a couple of years ago, my AC stopped blowing cold air. I took it into a mechanic, and he replaced my AC relay and refilled the system for a few hundred dollars. It worked fine for the rest of the year.

Early this year, my AC stopped blowing cold air again. Not wanting to pony up a few hundred bucks to have my system refilled again, I decided to try this one on my own. After reading around a lot, I decided to just refill the AC system really fast with a simple can and hose thing. The gauge showed that it was low but not empty, so I proceeded. However, I really underestimated the speed at which this stuff dumps out, and only stopped after a loud PPPPVVVVVVVT and a cloud of white vapor shot out. Crap. I checked the gauge, and the pressure was off the charts. Crap. I emptied out the excess refrigerant into an approved container, and slowly filled back up to the proper level this time. The car was cooling; all seemed well. Then I accelerated, and PPPPPVVVVVVVVT! Well, it's still cooling, and I was leaving for vacation the next day, so I left it as is. Drove to my vacation destination with it PPPVVVVVTing on the accelerations, then left it for a week. I thought for sure the system would be empty when I got back, but it was function the same way as it was the week before. I drove around for a couple of months by turning on the AC while at a red light, then turning it off before accelerating. It worked OK.

I left on another vacation for 2 months, and the car was not driven during that time. I get back, and it no longer PPPPPVVVVVTs, but it doesnt' cool well either. Though the passenger side AC is still cold and the compressor no longer cycles. Signs of low refrigerant, right? So this is where I'm at, what can I try?


Stuff that matters:

AC relay replaced and system recharged a couple of years ago, fixed problem.
When AC stopped blowing cold air, overcharged system (by a lot!!!) by accident.

White vapor shoots out of hose (I'm 75% sure) shown in pic below with a loud noise until refrigerant level is low.

Compressor stays on, only passenger side air is cold.



Now, I know I probably screwed something up big time, but I just wanna know what! I'm sure I've left out a lot of information, so please just ask if you think I have. I really appreciate it! My step dad has all of the proper equipment to work on the AC systems and some technical know-how, but I wanted some kind of idea of what to look for before I'm able to use it this weekend.

Here are some images and a of where I believe the refrigerant is shooting out at (Where the metal tube turns into a rubber tube):




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post #2 of 6 Old 09-06-2014, 08:12 AM
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I recommend evacuating the system and do a leak test. Follow this videos,

If you think there's leaks (which I think there is), charge the system with refrigerant with DYE!
Find all the leaks, and replace the parts, hoses, o-rings etc...where is leaking.

Do it right, so you don't have to do it over and over again.
Good luck.

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post #3 of 6 Old 09-08-2014, 07:03 PM
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What you are describing is a refrigerant leak at the high side hose. I would replace the hose as you should never see refrigerant leaking out of a sealed system. Once you replace the hose vacuum the system and charge with the exact amount of refrigerant R134a listed on the sticker under the hood. There is a low pressure switch that may also be leaking from there.

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post #4 of 6 Old 02-27-2016, 05:46 PM Thread Starter
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Sorry for bumping such an old post, but I couldn't find how to edit the original thread, and I wanted everyone to know my findings!

Basically, the sound I was hearing is the high pressure relief valve on the compressor. Once I realized that, I decided that the high pressure side was blocked somewhere. Further research and thinking led me to believe it was the receiver/dryer failing. I evacuated the system, and opened it up. Yep, the receiver/dryer dessicant pack had broken open, and the dessicant was clogging the condenser. Rather than trying to salvage the condenser (it may have been possible), I just replaced them both along with any easily accessible O-rings. Pulled a strong vaccum on the system, and charged it back up. 8 months later the AC is still working beautifully. So cold that the minimum Max AC setting was too much on a hot Louisiana summer day!

Good luck!
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post #5 of 6 Old 02-27-2016, 06:36 PM
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thank you for the update. interesting.

did you have to remove the radiator to remove the condenser?

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post #6 of 6 Old 02-27-2016, 07:51 PM Thread Starter
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Nope! The condenser was actually very simple to remove. I believe it was just a few bolts after taking off the AC lines.

EDIT: I may have had to take off a plastic piece as well. It's been a while, but I remember it not being very hard
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