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Old 08-05-2013, 03:58 PM
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Question Need A/C Help, any experts??

2004 6.0 PSD F250 Extended cab.
Was traveling to Lexington, KY last week from Indianapolis with A/C on. It worked fine until I crossed the Ohio River. (I am sure this had nothing to do with it....) any way...stopped cooling. Fan speed is on and and seems to work OK, a mechanic friend tested the gas pressures and they seemed to be OK too. I checked the fuses under the steering column and they seem to be fine. Are there any other fuses to check? Has any one else had this problem?

Thx
RW
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Old 08-05-2013, 07:56 PM
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Same thing happened to me on a120mile trip worked then stopped. Did notice a slight noise in front of truck. Couple days later lost belt. I think compressor clutch seized or lost compressor.
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Old 08-06-2013, 03:49 AM
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Thank you for the quick reply. I am afraid it is the compressor also. I don't hear any strange noises and have been keeping my eye on any signs of wear to the belt.
Regards
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Old 08-06-2013, 08:03 AM
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Did your friend check the refrigerant pressures while the truck/ac was operating? Only reason I ask is if the truck is not cooling, there is no way to check refrigerant pressures correctly unless the compressor is operating. What were the refrigerant pressures?
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Old 08-06-2013, 08:04 AM
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If the compressor was seized- your truck would have a hard time starting as well(almost would sound like you have dead batteries)
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Old 08-08-2013, 05:09 AM
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A/C on High

Quote:
Originally Posted by 04cr450 View Post
Did your friend check the refrigerant pressures while the truck/ac was operating? Only reason I ask is if the truck is not cooling, there is no way to check refrigerant pressures correctly unless the compressor is operating. What were the refrigerant pressures?
Yes he did. We put the A/C on max. and the fan on high. It was a good hot day. He thought for sure he was going to find a low charge but didn't, so we have to look elsewhere.

Thanks for the response.
RW
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Old 08-08-2013, 05:12 AM
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Everything seems to work except the A/C

Quote:
Originally Posted by 04cr450 View Post
If the compressor was seized- your truck would have a hard time starting as well(almost would sound like you have dead batteries)
That is the surprise everything seems to be working correctly. Belts are tight. Pulleys do not seem to have bearing issues, no fuse blown. I am in the process of checking switches in the system to see if they are functioning.

Thanks for the response.
RW
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Old 08-08-2013, 09:24 AM
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When you say your compressor was operating you do mean the clutch was engaged, correct?

If the clutch is engaged, no fuses are blown, and everything else is working, I would think you are leaking freon somehow (though if it does get too low the clutch will not turn) or you have clogged orifice tube. What were the gauge readings?
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Old 08-08-2013, 09:56 AM
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Check your lines on the passenger's side of the engine bay. Should be two large lines into the top of a "can" (filter). Feel them (with AC running) to see whether either of them is cool to the touch. The small line runs right past the filter. It has a plastic clip over a push-to-connect fitting. It should be ambient temp. or warmer on the front side of the connector, and cool on the back side.

Sorry, that's about as accurate as I can get without knowing the pressures. If you can let me know what you find I might be able to help narrow it down.
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Old 08-08-2013, 11:15 AM
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Quote:
Originally Posted by bubmiller View Post
Check your lines on the passenger's side of the engine bay. Should be two large lines into the top of a "can" (filter). Feel them (with AC running) to see whether either of them is cool to the touch. The small line runs right past the filter. It has a plastic clip over a push-to-connect fitting. It should be ambient temp. or warmer on the front side of the connector, and cool on the back side.

Sorry, that's about as accurate as I can get without knowing the pressures. If you can let me know what you find I might be able to help narrow it down.
Not to hi jack his thread, OK I mean to hijack his thread. Mine is doing the same thing.

Its 85 outside currently. Mine will blow slightly cool sometimes then other times it will blow warm. My compressor is also working. I just replaced the a/c pressure switch and have even tried straight wiring the switch to verify compressor was working. Mg pressure is ~340psi. It was low when I got the truck and had to put a large bottle of sub-zero in it from auto zone. My line does get pretty cool on right side of engine bay but it is no where as cold as the wife's table or my work civic is. Not sure what else to look at and had rather do the work myself than have to take to the shop? Any suggestions? I am leaning towards a clogged orrifice also. Also do our trucks have a cabin filter?

2007 F250 crew cab 6.0 4x4.

Any help is appreciated

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