Question about 1999 Dodge Durango

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Where is the low side sevice port for my air conditioner. I need to charge it up and I'm not sure which one it is?

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The low side is the smaller of the two the hose will only fit the small one, this fitting is near the compressor, the cap should have an l on it for low side if not remove both caps anduse the smaller fitting.

Posted on Jul 12, 2010

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1 Answer

Where is the low side port for ac charge located on engine for 2001 mountaineer


4.0L , 5.0L : Back near the firewall (Evaporator) above the accumulator/drier. The line will be cold /low pressure port.
Near radiator (Condenser) is hot/high pressure port

Be careful, if unsure do not risk it. If the system is leaking this will be a very temporary fix and probably needs the service of an experienced auto AC person.

Mar 20, 2013 | 2001 Mercury Mountaineer

1 Answer

I need to locate the low side ac port. air conditioner needs charge and i cannot locate the right port.


The easiest way to locate the low side charge port on any vehicle is to locate the A/C compressor, follow the "larger" of the two lines all the way back to the firewall. Some where along that line you will find the low side charge port.
Good luck.
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Aug 06, 2010 | 2001 Pontiac Grand Am SE

2 Answers

How to recharge recharge airconditioner


Hi, determine if your car uses R134 or R12 refrigerant. You will notice screw type connectors on the both the High Pressure Side and Low Pressure Side lines in models using R12 refrigerant. R134 compatible models have quick connect valves on both sides. Models made before 1995 may use the old R12 refrigerant. If this is the case, you must have your Chrysler's air conditioning system retrofitted to use R134 refrigerant. Mixing R12 and R134 refrigerants is dangerous and may cause damage to your vehicle. Check your air conditioning system pressure using an automotive air conditioning pressure gauge. Keep in mind that in order to get an accurate reading, the air conditioner has be turned on the coldest setting with maximum blowing power. Remove the Low Pressure Side port valve cap and set it aside. The location of the port varies, but it is usually in front of the engine block. Attach the refill hose to the port on the Low Pressure Side of the air conditioning system. The Low Pressure Side port is smaller the High Pressure Side port. Because the ports are different sizes, the refill kit hose should fit only on the Low Pressure Side port. Additionally, the High Pressure Side port will usually have a red cap or be marked with an H or the word High Allow the air conditioner to **** the refrigerant out of the can by slowly turning the valve on the refill kit hose. Pay attention to the way you hold the can. Most kits will have you hold the can upright when you recharge the air conditioning system. It may take as long as 10 minutes to empty a single can. Turn the valve to the off position and remove the refill hose from the port. Recap the port before closing the hood. Let the air conditioner stay on for at least 30 minutes. This allows the refrigerant to move throughout the entire system.
Take care

Aug 03, 2010 | 2006 Chrysler Town & Country

1 Answer

Where exactly is the low port for the air conditioner on a 1998 Pontiac grand am


Normally you cannot charge the high port as the connection will not fit. Also if the A/C is working the high port gets much hotter than the low port. Also on the plastic cap it will have an L on the low pressure port and an H on the high pressure side. Do not try to recharge it unless you are 100% sure. If you are needing to recharge the system then it has a leak that needs to be repaired. It is technically illegal to add refrigerant to a system with a leak without first repairing the leak. So, my advice is to get the leak fixed first and then have the system charged by a professional with the proper equipment and training. But the choice is yours.

Apr 16, 2010 | 1998 Pontiac Grand Am

3 Answers

Where is the port for the air conditioner on a


Low Side service port is on a larger hose assembly on passenger side heading out of the compressor to the firewall into the vehicle compartment(evap housing).This is the service port which will be low pressure and will accept freon.High side is always small metal piping and heads up front towards the reciever drier and condenser....be safe

Aug 16, 2009 | 2003 Chevrolet Cavalier

1 Answer

My pt cruiser air conditioner will not cool. I


Go to low side fitting. Usually the larger diameter hose & tubing, is low side.

Jul 16, 2009 | 2004 Chrysler PT Cruiser

1 Answer

Where is the low side service port on a 2003 grand am (6cyl)


If your talking about the low side sevice port to charge your ac, its easy to find. With your recharge kit, it comes with a nozzle to attach to this lowside port. Each port, (lowside and highside), are different diameters. The charging nozzle will ONLY fit onto the lowside port. Just run the length of your ac lines from the compressor and trace them back to the firewall. You should find both ports before you hit the firewall.

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1 Answer

Low side service port for air conditioner for 1988


It should be on the accumulator. Passenger side near the strut tower.

Jul 04, 2009 | 1988 Buick LeSabre

1 Answer

Where is air conditioner recharge port


remember you will always charge an air conditioner on the low side. which is always on the larger hose. there is a smaller one which is the high side so stay away from the small one.. look up near the radiator and see if you see the dryer which is about 3 inches across and 8 inches long and looks like a cylinder.. on this device there is a port where you can charge it .. also this year might be up near the firewall .. they change locations too often .. thanks and holler if you need more. Jerry

Apr 25, 2009 | 1999 GMC Savana

1 Answer

Air conditioner needs charging. Where is "low-side service port?


The port will either be in the low press line ( large line ) or on the bottle shaped accumulator by the firewall.

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