ac problem???
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Senior User
Joined: Mar 2003
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From: south jersey
ac problem???
The accumulater (dryer) in my 97 explorer limited with sohc v6 rusted a small hole ni it so I replaced it. I tried recharging it and the compressor keeps kicking on for a second and then goes off and the ac wont get cold. I have 100psi on the accumulater and it wont take more. What could be the problem?
Elder User
Joined: May 2004
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From: Webster, NY
when you charged it did it take any refrigerant at all? My <b>guess</b> is the system pressure is too low on the low side and the compressor is not being allowed to come on. You would likely have to bypass the low pressure cutoff to get it to take a charge. But that is just a guess.. all I have ever done is add some more refrigerant.
Also, your pressure readings are only valid when the compressor is running. For what you are doing you might want to have a full set of gauges to work with (low side and high side) to make sure you are not doing more harm than good.
Also, your pressure readings are only valid when the compressor is running. For what you are doing you might want to have a full set of gauges to work with (low side and high side) to make sure you are not doing more harm than good.
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Senior User
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From: south jersey
How do I bypass it. Its taking pressure. I has 25psi to start but now have 100. Do you tilt the can upside down to get the refridgerant in it? The compressor wasnt coming on at all untill I put more in it but it wont stay on. Isnt 100 too much for the low side. And wheres the high side at?
Elder User
Joined: May 2004
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From: Webster, NY
If the compressor is not running then any reading is not valid as the low side and high side will equalize. What is the reading when the compressor is running (is it staying on). You also want to, from other things I have read here, have the engine at somewhere between 1,500 and 2,000 RPM.
As for when I put additional refrigerant in mine the can directions said to keep it upright... mind you I was not charging the system from sratch, just adding coolant to it. I am not sure, but you might need to pull a vacuum on the system if it is fully empty before you can charge it up again. I am sure others will post more soon... you are now beyond my knowledge of this stuff.
As for when I put additional refrigerant in mine the can directions said to keep it upright... mind you I was not charging the system from sratch, just adding coolant to it. I am not sure, but you might need to pull a vacuum on the system if it is fully empty before you can charge it up again. I am sure others will post more soon... you are now beyond my knowledge of this stuff.
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Senior User
Joined: Mar 2003
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From: south jersey
The compressor is clicking on and off. Its only staying on for a second at a time. It has too much refridgerant now I think cause its up to 100psi on the accumulator and I think Im supposed to be around 25. I need this fixed in 2 days and no one will look at it so I gotta get it done myself.
Rather Be Floatin
Joined: Oct 2005
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From: Marble Falls, Tx.
Did you pull a vaccum before you recharged? did you replace the orfice tube?
If you did not pull a vaccum you need to bleed off pressure from the high side while recharging, although that wont make the EPA happy!
The high side should be in the line exiting the compressor. You really do need a set of guages to recharge the system correctly and to monitor what is actually happening with the system.
Do yourself a favor and have a reputable shop pull a vaccum and recharge the system.
If you did not pull a vaccum you need to bleed off pressure from the high side while recharging, although that wont make the EPA happy!
The high side should be in the line exiting the compressor. You really do need a set of guages to recharge the system correctly and to monitor what is actually happening with the system.
Do yourself a favor and have a reputable shop pull a vaccum and recharge the system.
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Senior User
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From: south jersey
I will replace the orfice tube this time. SO while im recharging it I bleed pressuse from the system from the high side? Should I be at 25 psi on the accumulator? I would get a shop to do it but I need it done in the next 2 days and no one is available.
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Elder User
Joined: May 2004
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From: Webster, NY
Again, the only time you can measure pressure is when the compressor is running if it is clicking on and off then you do not really know what is going on in the system. No offense, but I think you are in over your head on this one.
This is just my opinion, but I would stay the heck away from the high side of a refrigerant system if I was not experienced with them or had someone there that could help me out that had done it before. But that is my 0.02... I just don't want to see someone get hurt based on amateur/shade tree mechanic information.
This is just my opinion, but I would stay the heck away from the high side of a refrigerant system if I was not experienced with them or had someone there that could help me out that had done it before. But that is my 0.02... I just don't want to see someone get hurt based on amateur/shade tree mechanic information.
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red boat has the plan. the system must be perfectly clean and also NO air inside. if you removed a hose and put on a new can, then you have some dust and air inside. you can not add freon and make it work.--- the dirt will go to the orifice tube, it needs to be changed out. next you need to have a vacuum pump and pull a pure vacuum on the system. it must have NO air inside. then you blead the freon in to replace the vacuum and go back to a zero state. next you continue to add freon untill the low side is about 35 psi and the high side is 250-300 psi. if you dont have a HP gauge then you will see the low side is 35 psi and the compressor will start to cycle less and less. when it stops cycling, then stop filling the freon. when you shut the motor off, then the pressure will stabalize in the system and both high and low will read 100 psi....... i dont think you have the vacuum pump from your post. go to Wal Mart, etc and have a vacuum pulled and the freon added.
Posting Guru
Joined: May 2002
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From: Baltimore
In addition to what Steve just stated, since you replaced the accumulator, you also need to add some oil to the system. I would suggest adding 2-4 ounces, although you should consult an AC manual for your system. If you just add freon without any oil, you stand a good chance of blowing up the compressor.
Elder User
Joined: Aug 2006
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From: Olathe, KS
Not all little cans have oil. Typically just those with the quick charge attachment. It will state the oil it is included.
As a couple here have noted, the system must be pumped down to remove the air. Even if you get it to cool with the vent method, it will minimal at best. Sure if you pucs enough freon $$$$ thru it you could get it near usable. but a big word of caution. Contamination (air) will increase the high side pressure. That bleed method could easily put the high side in teh 350+ psi. It will hurt when a line lets go.
I hope you can find a shop to vac and charge it for you.
Be safe & good luck
As a couple here have noted, the system must be pumped down to remove the air. Even if you get it to cool with the vent method, it will minimal at best. Sure if you pucs enough freon $$$$ thru it you could get it near usable. but a big word of caution. Contamination (air) will increase the high side pressure. That bleed method could easily put the high side in teh 350+ psi. It will hurt when a line lets go.
I hope you can find a shop to vac and charge it for you.
Be safe & good luck