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Pressure too high on charging but not enough freon to cause it.
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jasonder
New User
Jun 6, 2012, 7:43 PM
Post #1 of 10
(6859 views)
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Pressure too high on charging but not enough freon to cause it.
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Ok, so I am learning the hard way. My wife's 2005 Jeep liberty 3.7L with 92000 miles was not cooling in the heat of the day. I hooked up one of those DIY cans. Over charged the system. Took it to a local shop that charged me 200 to tell me the compressor was bad and I needed to replaced that and the fixed orifice line, and the accumulater. They wanted 800 so I told them nevermind. I then replaced those three myself putting 8 oz of pag 46 oil and put a vaccumn for 45 minutes. Tested for 30 min and it held vaccumn. Started to charged the system and got a little under a 12 oz can in and the high side was reading 45 and low was reading 60. I did flush out the other lines I didn't replace. I then figured the condenser had a clog so I replaced that and did the same and got the same readings after a can. Any ideas.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 7, 2012, 3:18 AM
Post #2 of 10
(6800 views)
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Re: Pressure too high on charging but not enough freon to cause it.
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You really need to put the tools down and pick up your wallet. You are just going to cost yourself more than it already has because you have no clue what you are doing. It is totally impossible to have more pressure on the low side than you do on the high side unless you have the gauges hooked up backwards and that shouldn't be possible either. You also put way too much oil into it. Time to cut your losses and let someone else do it all over.
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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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jasonder
New User
Jun 7, 2012, 5:24 AM
Post #3 of 10
(6788 views)
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Re: Pressure too high on charging but not enough freon to cause it.
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Sorry I missed a 0 when I was writting. The high side was 450. The shop said that compressor took 8 oz. It was a remanufactured compressor and it had 1.5 ounce in it already. I added 4 to the accumulator and 2.5 to the compressor. How much oil was I suppose to use?
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nickwarner
Veteran
/ Moderator
Jun 7, 2012, 4:25 PM
Post #5 of 10
(6758 views)
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Re: Pressure too high on charging but not enough freon to cause it.
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Please tell me that DIY can didn't have sealer in it. If so, you've wasted a lot more money and would've been better off giving those guys the $800 they asked for.
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jasonder
New User
Jun 7, 2012, 4:37 PM
Post #6 of 10
(6756 views)
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Re: Pressure too high on charging but not enough freon to cause it.
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No it did not. Stupid question but if I changed everything but the evaporator would there be more than a trace amount of oil in the system? I have always heard that the evaporator has a very small amount of oil in it if any. Also if I did put too much oil could that be why the pressure is too high or more likely in my mind is I have a clog in the system and the only place left that could be assuming all the new parts are good would be the exaporator. I wish I could take it to some place to have it fixed but I have spent too much already and can't afford to take it somewhere.
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nickwarner
Veteran
/ Moderator
Jun 7, 2012, 4:57 PM
Post #7 of 10
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Re: Pressure too high on charging but not enough freon to cause it.
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As HT pointed out, you haven't even found the original failure yet. You're getting into a system you don't understand and I blame the government people who allow 134a to be sold everywhere to everyone for a lot of broken systems. You've spent a lot more than you needed to and are right back at square one. I'd make sure the windows roll down and save up some cash to let an AC expert take care of this properly. You're going to empty your wallet way more doing this yourself and still won't have reliable working AC. Not trying to insult you, but telling you how it is. I've seen a lot of $500 jobs turn into $1500 catastrophic failures because people think AC is easy and anyone can do it. Like you said in your first post, you're learning the hard way.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jun 7, 2012, 5:13 PM
Post #10 of 10
(6738 views)
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Re: Pressure too high on charging but not enough freon to cause it.
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jasonder: For now, disable the compressor so it can't come on. At least you'll save the belt from burning up and falling off then all kinds of other problems not even A/C related could get damaged. If one belt on this you won't be driving it at all.
Save up for some help. As DS said above the cut out switch for high pressure should have shut this down so the diagnosis is going to take some real work, equipment and know how. A/C isn't a good DIY thing to mess with without extensive know how. Cut your losses where they stand and disable the compressor as it will or should just sit there as an idle pulley,
T
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