Foxgoku Posted July 31, 2023 Report Share Posted July 31, 2023 (edited) Hi all, I've experienced a strange anomaly that I hope someone can help me out with. Last summer I replaced the condenseron my 2008 3.5L Ford Edge, and it was working great. However, during the winter, the A/C inadvertantly was on at a moment and I heard a pop followed by the hiss of refrigerant leaking out. At the moment I put it off as it was winter and not needing a/c at the time, however, I have now turned back to getting this fixed. At first, I pulled a vacuum on both the low and high side of the sytems. After letting it sit for a while, both seem to hold the vacuum fine and there appears to be no leaks. At this point, I decided to try and recharge the system. I started to refill the refrigerant and all has been going fine. It was around 90 degrees out so I was expecting somewhere around 45-55psi on the low and 250-270psi on the high side. Although it ended up showing around 45 and 275, everything seemed to be working normally. The pressure normalized when turning off the AC the pressure went back to the 45/275 when it was on, etc. I let the system run for 30-45 minutes making changes and looking for any changes. Nothing out of the ordinary occurred. At that point, I packed up the tools, as I figured the job was done. My last test was for a quick drive. I started the car and again, everything was fine, however, when I put the car in Drive and began to drive away, the hissing occurred again and it seemed to let out the AC. I'm at a loss for what would be occurring here. Is there some sort of relief valve I don't know about? and is it only active when I put the vehicle in drive? Thanks in advance for any direction on this. TLDR: AC system operates fine in Park, but loses pressure when placed in Drive. Edited July 31, 2023 by Foxgoku Added TLDR Quote Link to comment Share on other sites More sharing options...
kruzr1 Posted August 1, 2023 Report Share Posted August 1, 2023 I'm definitely not an expert on a/c systems, but isn't 275 a bit high for the high side reading. Did you check/replace the valves in the low and high side ports? Quote Link to comment Share on other sites More sharing options...
Foxgoku Posted August 1, 2023 Author Report Share Posted August 1, 2023 For the temperature at the time it was pretty close, say within about 7 psi. I have changed the service ports. Also when it is leaking it appears to be occurring around the lower passenger side of the front. Somewhat close to where the compressor would be. Quote Link to comment Share on other sites More sharing options...
EddieHudson Posted August 1, 2023 Report Share Posted August 1, 2023 How much R134a did you replace? Quote Link to comment Share on other sites More sharing options...
Foxgoku Posted August 1, 2023 Author Report Share Posted August 1, 2023 I'd say somewhere around 17 ounces. Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted August 2, 2023 Report Share Posted August 2, 2023 where refrigerant is concerned do not guesstimate. use pro gauges and fill the proper amount of refrigerant and pag oil. ac in a can is quite prone to error and these systems are very finicky about the amounts added. 2007-2010 edge mkx Air Conditioning (AC) System Recovery, Evacuation and Charging.PDF 1 Quote Link to comment Share on other sites More sharing options...
Foxgoku Posted August 2, 2023 Author Report Share Posted August 2, 2023 So...looking at your pdf above, where is that A/C pressure relief valve that is showing on the sheet. Quote Link to comment Share on other sites More sharing options...
EDST777 Posted August 3, 2023 Report Share Posted August 3, 2023 On 8/2/2023 at 2:04 PM, WWWPerfA_ZN0W said: where refrigerant is concerned do not guesstimate. use pro gauges and fill the proper amount of refrigerant and pag oil. ac in a can is quite prone to error and these systems are very finicky about the amounts added. 2007-2010 edge mkx Air Conditioning (AC) System Recovery, Evacuation and Charging.PDF Hi, I will ask an additional question in this topic : does it make sense to recharge the EDGE 2008 refrigerant, during this time the refrigerant could decrease in volume, although I do not often use the air conditioner, but it also happens because of cooling, which I consider sluggish or otherwise not quite energetic or not what I would expect and want it to be. I have heard the opinion that recharging the refrigerant in store conditions will be much worse than the factory one, is this true or do I need to try? Any thoughts. Quote Link to comment Share on other sites More sharing options...
Foxgoku Posted August 16, 2023 Author Report Share Posted August 16, 2023 Found the issue!!! Turns out that the discharge hose was bad. The outer rubber had broke away from the inner lacing causing the leak at pressure. Replaced the hose and now the ac is stable. Thanks everyone fornthe help and responses. 3 Quote Link to comment Share on other sites More sharing options...
edjunior Posted August 17, 2023 Report Share Posted August 17, 2023 21 hours ago, Foxgoku said: Found the issue!!! Turns out that the discharge hose was bad. The outer rubber had broke away from the inner lacing causing the leak at pressure. Replaced the hose and now the ac is stable. Thanks everyone fornthe help and responses. Awesome. Glad you got it fixed. And thanks for getting back up here and letting us know the fix. Quote Link to comment Share on other sites More sharing options...
bwguardian Posted October 3, 2023 Report Share Posted October 3, 2023 I have a similar issue and made a separate post. I re-read your post here and you don't really say if your leak was coming from the hose of the blow off valve. Was the hose causing an internal blockage causing the blow off valve to release refrigerant, or did the hose have a small hole which only leaked under pressure? Quote Link to comment Share on other sites More sharing options...
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