Question about 2004 Hyundai Elantra

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Adding freon which port do i add freon to the L blue cap or R cap

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The "Low" side or the "L" blue cap.

Posted on Jul 29, 2010

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1 Answer

Where do I add freon on a 2006 Ford Mustang GT?


If your system is blowing warm I would recommend having the system evacuated and check for leaks. Just adding Freon will not give you ice cold A/C. There are two valves, low side and high side. Usually the plastic caps are blue for low side, red cap for high side. If you use a commercial A/C machine to service the vehicle, both valves are connected to check pressures in the system and also to fill the system with the correct amount of Freon. The low side (blue) is located at the firewall near the dryer and the high side (red) is usually on the passenger side near the radiator.

Jun 16, 2017 | Ford Cars & Trucks

1 Answer

Where is the ac port located to add freon


On a 2002 Mitsubishi Montero LTD, the a/c charging port is between the battery and the windshield. It is the port that has a cap labeled with an "L" (Low Side).

When the a/c is on, "L" (Low Side) gets cold while the "H" (High Side) gets hot.

Make sure you use the Low Side (cold) for adding Freon.

(note: over the counter freon kits should not fit the High Side port anyways) 6d9ed8b1-112d-471e-93a4-44bee9a08459.jpg

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May 30, 2014 | 2002 Mitsubishi Montero

1 Answer

What is the correct pressure for freon in AC unit and what is the color of the cap where you add the freon?????


The charging port cap is usually blue, The charging fixture hose will not clip onto the wrong port, so you really can't mess that up. the pressure of a system as measured on the low side hose should be about 28-32 PSI with the system stabilized and engine at operating temperature.

Jun 26, 2012 | Cars & Trucks

1 Answer

I have a 2005 buick rainier i need to know where is the low pressure port where i can add freon at


Add freon on the low side port:

The low side port is located on the thicker piping vs. the thinner piping.
It may have a black or blue cap.
The hose, don't worry' won't fit anything but this quick connector,

Jun 23, 2010 | Cars & Trucks

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

1 Answer

How do charge the a/c? there are 2 ports? wich one do i use?


If you want just to add freon , you need to use port with blue cap(low side) , if caps are not colored then the low side port always smaller then high side in diameter.

Jun 08, 2010 | 2004 Nissan XTerra

2 Answers

Adding freon to 98 Isuzu Amigo


You need to add the freon on the low side which is usually indicated by a blue cap. The red cap is the high side port. Never add freon using the high side port. Typically if you are buying a guage set from your local auto parts store, it will only attach to the low side service port because they are diffent types of connections. Another easy way to tell is to turn your AC on and feel the lines that the ports are attached to. The low side should be cold/cool and the high side will be hot.

Jun 28, 2009 | 1999 Isuzu Amigo

1 Answer

Freon pressure


People are actually helping me understand things right now from this website, but I will share with you what I learn,,,its added to the condenser, the pressure is another story....call a dealership....better yet wait for the experts to respond.,

May 10, 2009 | 1995 Nissan Maxima

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