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Old 09-24-2007, 01:13 PM   #1
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Default Need to add freon to the AC - where is the outlet?

I have been looking for the low pressure valve but can't find it? Please help, thanks!
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Old 09-24-2007, 03:20 PM   #2
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Like I say with all AC if you don't know don't mess with it. AC can hurt you quick.
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Old 09-24-2007, 04:15 PM   #3
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I am just using the cans that come with a gauge sold in auto stores designed for the general public. I am following the instructions on the can and my manual instructiosn to just add some Freon.
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Old 09-24-2007, 06:38 PM   #4
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The low pressure valve is #5 :Click the image to open in full size.
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Old 09-24-2007, 06:55 PM   #5
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Originally Posted by johny1 View Post
I am just using the cans that come with a gauge sold in auto stores designed for the general public. I am following the instructions on the can and my manual instructiosn to just add some Freon.
Whats the high side reading? Is the high side fluctuating? To do it the correct way take it to a shop and let them evacuate and re-charge it with the correct amount of freon. That way its not over or under filled. They can spot a problem before you can.
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Old 09-24-2007, 06:56 PM   #6
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First, not sure where the low pressure port is on your model, follow the hoses and look for a fitting with a cap. The R-134 systems have different sizes for the low and high pressure ports, so it's the next best thing to idiot-proof. Low-side will likely be on the passenger side of the engine compartment somewhere.

Now, I have the same concerns as user NGM - bad things can happen to you if you aren't sure of what you're doing. The $50-$100 saved will look pretty small if you end up with a permanent injury. Eye protection is a must, face and hand protection are strongly advised.

I like to encourage people who have the initiative to do-it-yourself, but this is an area that one should get some better training other than the couple of paragraphs of instructions on the back of a kit.
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Old 09-24-2007, 07:56 PM   #7
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This is an awesome diagram - thanks a lot! Both caps on the high and low are black and it says nothing on them. Usually they are blue and red with stickers. I saw the one that you specify as the low pressure valve on the diagram but I expected it to be somewhere on the hose and be a blue color. Thanks again - I will wear all the protection I have - maybe my motorcylce helmet
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Old 09-25-2007, 07:00 AM   #8
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This is an awesome diagram - thanks a lot! Both caps on the high and low are black and it says nothing on them. Usually they are blue and red with stickers. I saw the one that you specify as the low pressure valve on the diagram but I expected it to be somewhere on the hose and be a blue color. Thanks again - I will wear all the protection I have - maybe my motorcylce helmet
Again I have to stress. Reading one side of the system is not the best indicator of a full or low system. Its only 100 bucks or so to have it done right.. Plus most of those DIY kits have leak stop in it. That will mess up a Ford AC system fast as hell. The runners in the condensor are tiny. Doesn't take much to plug them up.
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Old 09-25-2007, 02:21 PM   #9
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The stop leak additive in the can is a very good point that I did not think of. Thanks, I may just take it to the dealer.
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Old 04-20-2009, 08:31 PM   #10
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Sorry to bother you, but i too need to add freon to my 1999 4.6l. could i ask what is valve #2 on diagram is this the high pressure line? thanks. Dalej
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Old 04-20-2009, 08:31 PM
 
 
 
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