How to re charge a/c - Ford Powerstroke Diesel Forum
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Old 10-18-2012, 05:42 PM
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How to re charge a/c

Did head stud job. Just now getting around to re charging a/c. How do I go about it? It's not taking any refrigerant. The a/c clutch doesn't kick on at all. It's plugged up and fuse is good. It worked perfectly before, never any problems. Thanks in advance.

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Old 10-18-2012, 06:12 PM
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Is it seized up?
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Old 10-18-2012, 06:19 PM
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IIRC, you need to apply 12v with a jumper cable to the plug. I just never did it on my Ford, I've done it on my Dodge.


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Old 10-18-2012, 06:28 PM
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Something else 4 ya to think about. I juz did this very thing with my 2005. I got the largest can that Wally world had and I think Im gonna need to get another. It gets cool but not reeley cold. Pump kicks on and off but seems to be half azzin it.
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Old 10-18-2012, 06:33 PM
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That is because you need to pull a vacuum on the system to boil all of the moisture out than add freon. If you don't pull a vacuum first your going to kill your compressor in the end.
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Old 10-18-2012, 06:37 PM
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Did you disconnect any of the refrigerant lines? If so you will need to change oil in compressor and change the filter drier. Once you get everything reconnected you will need to evacuate the system with a vacuum pump. Once system is down in a good vacuum you can recharge system. Make sure the refrigerant tank is warm 70-80*F. As refrigerant empties from tank pressure will drop and equalize to system pressure. If outdoor air temp is low and tank is cold you will not get enough refrigerant in system to allow low pressure switch to make. Wouldn't jumper it out unless your sure where to jumper to make low pressure switch. To warm refrigerant tank you can use warm water bath just don't get it too warm. Hope this helps good luck.
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Old 10-18-2012, 06:39 PM
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Quote:
Originally Posted by Tuscany View Post
That is because you need to pull a vacuum on the system to boil all of the moisture out than add freon. If you don't pull a vacuum first your going to kill your compressor in the end.
Who you talkin to? (Now ya got me scared!)
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Old 10-18-2012, 06:44 PM
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You and op.
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Old 10-18-2012, 06:47 PM
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aaaaaaaggghhhhh krap!
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Old 10-18-2012, 06:51 PM
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If you open up an A/C system for any time period you have to evacuate the system to get all non-condensebles out of the system. Moisture will freeze in the metering device not to mention it does not compress. Head pressure will run extreamly high. High heat and moisture causes acid and will copper plate in your compressor causing excessive wear and ultimately destroy your compressor.
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