Question about 2000 GMC Yukon Denali

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Trying to charge ac too much pressure on port cannot get coolant in

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There should be a pressure relief valve inside the port. It should look like one that goes to a car tire. Take a pin or needle of some sort and relieve some of the pressure built up in the system.

Posted on Jul 15, 2010


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What kind of ac coolant does it have 134a or r 12 and where is the low pressure port for the ac located

Depends on the year. Cars in the early 90's used R12. Anything later uses R134a. The size of the charge ports will define the R134a port. An adapter is needed to fit on the charging hose. R12 requires no such adapter. Ther charging label under the hood will tell you what refrigerant is needed too. Since you failed to give enough information on what make and model car you have, a general answer for the location of the low pressure port will be given. On the compressor, the larger diameter hose connection is the low side. Connect there, or look for the drier/accumulator (Large diameter silver container near the firewall). Connect there. You will need to access the AC information label under the hood to determine how much freon to add to the system.

Mar 12, 2016 | AC Cars & Trucks

1 Answer

I'm trying to recharge my ac on my 2006 Lexus RX400H but cannot get the hose to snap on the low pressure port. Is there another type for hybrids? Or why will it not connect?

the ports on an R134a AC system are different sizes to prevent trying to charge from the wrong side. If your coupling doesn't fit on the port snugly, you may have misidentified which port is which. If it does fit and simply won't engage, then you should clean the port, check the coupling for debris, and make certain that you are applying pressure evenly as you connect it. Any misalignment / uneven pressure, will prevent the coupling from engaging. You may also need to manually engage the retaining ring due to manufacturing variances.

Jul 01, 2014 | Cars & Trucks

1 Answer

My 2009 Dodge Ram 1500's AC is not blowing cold

Most likely your system just needs to be charged with r134a coolant. You can do it yourself. Just head down to the local auto parts store and buy a can of coolant that comes with a hose and gauge attached and then locate you low pressure port on you system. It is typically located on the passenger side between the radiator and the firewall on a silver tube. Don't worry you can't make a mistake as the coupler will only fit the low pressure side. When you locate it remove the cap and hook up gauge and can. Start the car and turn the AC to mac cold and highest fan speed. Then open the gauge depending on ambient temperature out side your gauge should read between 35-45 psi. The gauge should also be color coordinated as long as you don't fill until the gauge is in the red. Your good. Then close the gauge, remove it from the low pressure port and replace the cap on the port. (When the coolant is flowing into your system the can should turn quite cold and maybe even have some frost on it. No worries that is normal).

Sep 12, 2013 | 2004 Dodge Ram 2500

1 Answer

I need to find low pressure port on 1999 Labaron LXI for recharging ac coolant

Without A/C system theory & some training,
I would say no. Leave it to a mechanic with
the correct equipment

You can not just add very well with those wal mart
a/c kits

You have no way of knowing how much to add, without
a manifold gauge set attached to vehicle

If you need to add, you have a leak that needs to be
repaired & your poluting the atmosphere until the repair
is completed

Jul 26, 2012 | 1999 Chrysler Concorde

1 Answer

Where is the low ac port on a ford freestyle 2005... trying to locate to add coolant to my ac

ford usually hide the low pressure port behind one of the frond indicators. usually the right indicator.
hope this helps

Jul 17, 2011 | Ford Freestyle Cars & Trucks

1 Answer

Where is the low pressure for AC located on 2000 Lincoln Navigator

The low pressure port is the only one that your AC charging tool will fit on if you are planning to charge the AC unit with refrigerant. The high side port is much larger and the quick connect tool won't fit it. Look up high toward the firewall on Fords and Lincolns.

Aug 16, 2010 | 2000 Lincoln Navigator

1 Answer

At what pressure do i put the ac coolant at when charging

the pressure needed will change with outside air temp. but if you charge the low side to 35-40psi (high side 225-275psi if the a\c system is in good shape) you wont have any problems.
p.s. your low side port is on the accumulator\dryer under the pass. side fender. if you remove the headlight its easier to get to.

Aug 17, 2009 | 2001 Ford Focus

2 Answers

I'm trying to add refrigerant to my 1993 Infinit J30. I got the can of sealant and coolant mix from my local parts repair store, but the refrigerant doesn't seem to be leaving the can going into the car....

Do you have the car running while you are trying to charge the system?
And, do you have the can installed on the low side line (larger line)?
Let me know.

May 08, 2009 | 1997 Infiniti.5 J30

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