Anyone with a good understanding of the A/C system? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 07-07-2011, 06:53 AM Thread Starter
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Anyone with a good understanding of the A/C system?

Not sure what's going on with the a/c system. It won't cool down at idle, but cools fine after I start driving it. It seems to randomly cut off and blow vent air while I drive it, but seems to stay on majority of the time if I keep my speed around 72. If it does cut off all I have to do is downshift and get the RPM's up and it starts blowing cold again. There's plenty of freon (sp?) and had someone else look at it and said the clutch in the compressor was still good. Any ideas or extra info needed for ya'll to help? Thanks in advance!

Chris

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post #2 of 5 Old 07-07-2011, 07:47 AM
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not sure if this will help, did it with mine and worked on mine

SpringerPop's Compressor Clutch Air Gap

99 F350 dually 7.3l
01 custom f350 mud truck

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post #3 of 5 Old 07-07-2011, 03:00 PM
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my a/c does the same thing but at an idle it blows cold air and when I am moving it will shut off.

Im ganna try the air gap thing on the post above

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post #4 of 5 Old 07-07-2011, 05:15 PM
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Sounds like the compressor is tripping off on either low or high pressure. It could be caused by a number of things, I would get a mechanic that knows what they are doing to look at it.

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post #5 of 5 Old 07-07-2011, 07:48 PM
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If it was me, I would check for a loose wire connection on the clutch. Then I would check the refrigerant charge. If the system is low on charge, it will frost the low side of the system and trip the low pressure switch. If the high pressure switch is tripping, then you probably have a plugged up condenser.

What pressures are you seeing on the system as it runs?

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