Question about 1999 Dodge Durango

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Find A/C low pressure port

Finding A/C low pressure port to add refrigerant

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The low side is the fitting that is located between the compressor and evaporator. It should have a blue/light blue removeable cap. The high side will have a red cap.

Posted on Jun 06, 2010

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1 Answer

Location of the a/C Low Pressure Port


so,replace the evap,there are 2 ports,only one can be connected to,the other is diff size

May 27, 2015 | Cars & Trucks

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When i turn on the a/c,the compressor does not work


CHECK REFRIGERANT CHARGE. USING A MANIFOLD GAUGE SET. HOOK MANIFOLD GAUGE SET TO LOW PRESSURE PORT AND HIGH PRESSURE SIDE PORT. LOW SIDE PRESSURE SIDE SHOULD HAVE 25 - 36 PSI AND HIGH PRESSURE SIDE SHOULD BE 178 - 237 PSI. IF LOW SIDE PRESSURE SIDE READ BELOW 20 PSI THE LOW PRESSURE SWITCH WILL NOT TURN ON THE AC COMPRESSOR CLUTCH NEED TO ADD LITTLE MORE REFRIGERANT. IF REFRIGERANT LEVEL CORRECT CHECK AC COMPRESSOR FUSE AND RELAY.IF POWER GOING TO AC COMPRESSOR CLUTCH YOUR COMPRESSOR CLUTCH HAS OPEN WINDING. AC COMPRESSOR CLUTCH NEED REPLACING.

Aug 11, 2011 | 1997 Nissan Pathfinder

1 Answer

Add refrigerant- Where is low pressure port?


Most likely the passenger side. The good news is that R134A fitting on the refill can will only fit the low side because the fittings on Low and High side are different sizes. It should have a cap on it like what you find on a tire fill valve.

Jul 22, 2011 | 2002 Pontiac Aztek

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Where do i find the low side on ac unit


Check under the air filter box, just below it, will be the low side port.

Sep 02, 2010 | 1999 Chevrolet Lumina

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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

2000 Suzuki Vitara Air Conditioner


It does not contain Freon. It contains R134a refrigerant. You add it at the low pressure port. There is a blue or black cap on the connector. The low pressure pipe is the larger of the 2 metal pipes.

Jul 02, 2010 | 1999 Suzuki Vitara

2 Answers

FACING THE CAR, WHERE IS THE EXACT LOCATION TO ADD FREON TO A 1997 CHEVY MALIBU. WE FOUND A RED CAP BUT UNDERSTAND THIS IS NOT WHERE YOU SHOULD ADD. HELP .....


The low pressure refrigerant port is near the firewall2.gif, just after the receiver/dryer. You'll need a gauge and preferably an ac test manifold. You can use the manifold to add refrigerant up to the point where the system maintains the pressure level in the green area. There should be a blue cap on the low pressure valve.
I believe your malibu take's 12 ounce's of R134, don't over charger the system. You'll blow O rings and worst kill the A/C compressor.
Good luck and hope this helps. Here is a link for A/C recharging. http://www.geocities.com/vantaray/air_conditioning.htm

Aug 19, 2009 | 1997 Chevrolet Malibu

2 Answers

Which port is used to add refrigerant to AC on1999 Blazer


The low pressure port is on the drier (the silver cylinder by the blower motor on the passenger side of the vehicle). screw off the black cap and hook your adapter on to it.

Aug 08, 2009 | 1999 Chevrolet Blazer

2 Answers

Where do you add refrigerant to a 97 sho?


The high pressure port is in front of radiator fill reservoir. The low pressure port is located by the passenger strut tower.

Jun 24, 2009 | 1997 Ford Taurus

2 Answers

How to add freon in 2002 Ford Tarus? Where is the low pressure port loacated"


hi bighobo,

first, locate the bigger hose that comes out of your compressor that goes to your firewall towards the evaporator, that is the suction hose. look for some fittings that comes out of that pipe and covered by a plastic cap. that is the pressure port where you can add freon.

i hope i solve your problem..
tnx pls rate me

drcool299

Jul 19, 2008 | 2002 Ford Explorer Sport

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