No Air conditioning when driving - Diesel Bombers



Ford Powerstroke 99-03 7.3L Discussion of 99-03 7.3 Liter Ford Powerstroke Turbo Diesels

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  #1  
Old 07-03-2017, 02:19 PM
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Default No Air conditioning when driving

I have an 2003 with an issue.

We were driving last night and the air conditioning stopped working. So we shut it off and opened the windows.

After we arrived at home and were idle for a few minutes I turned it back on and it was working again. But as soon as I hit the accelerator it stopped working.

I backed in and popped the hood and I could see the compressor wasn't turning.

This morning I started it and tried and popped the hood and the compressor WAS turning and the air was working. Again, I hit the accelerator and it stopped working.

So I'm thinking the AC clutch is going bad but knowing these things can be more than meets the eye so I wanted to ask around before I spend $300 on a new compressor and $100000000 labor to put it in.

Thanks!!
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Old 07-03-2017, 06:38 PM
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Not likely the compressor clutch, most likely something computer related. Has any codes been set yet? If the clutch was going bad, it would not engage at all or would slip under acceleration. Probably a bad engine sensor, which one though is the $1000 question! A scanner would probably answer that question.
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Old 07-03-2017, 08:09 PM
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No, no codes yet. And everything seems to be working properly except for the AC.

Do you know of any particular sensor that might cause that? So I know which one to look at?

Thanks!
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Old 07-03-2017, 08:59 PM
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Might be as simple as low refrigerant, I think they use an actual pressure sensor now, instead of just an on/off pressure switch, so the computer see's the pressure abnormality, and shuts the compressor off. I would get that checked first.
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