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A/C Works Sometimes?

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Old Jun 18, 2007 | 03:10 PM
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A/C Works Sometimes?

My a/c blows cold when the rpms hit 2000 or so, and then will back off when the rpm's do. Has anyone had this problem before? I have a 99 psd, thanks for the help.
 
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Old Jun 18, 2007 | 03:12 PM
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Sounds like it is low on R-134.
 
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Old Jun 19, 2007 | 04:42 PM
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I had it charged up today and it worked great for about an hour, it is better but still not perfect. At first the condensor was clicking on and off and wasn't cooling.
 
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Old Jun 19, 2007 | 05:38 PM
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Condensor clicking? Do you mean the clutch for the compressor?

If the clutch isn't engaging, the air gap in the clutch might need to be adjusted - known Ford issue, really...

Or, you have a failing pressure switch.

More info needed, especially as condensors don't click
 
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Old Jun 19, 2007 | 08:59 PM
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i agree if the clutch is engaging and disengaging rapidly its gonna be low on refrigerant the other thing that it may be is that there could be a leak in the system or a blockage. your compressor comes on and off with pressure of the system it engages when low pressure is sensed and disengages when there is high pressure but since it is rapid i would either say it is low because of a leak or you have a bad sensor. try unpluging the high and low pressure sensor one at a time and see what happens (when the clutch isnt engeged)
 
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