A/C cold "sometimes"
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From: NH
A/C cold "sometimes"
I just had a garage recharge my 2005 F-350. They said it was down just about 2lbs of freon, but it held a vacuum and they recharged it. Cruising along under light to medium throttle, the A/C is nice and cold. At idle, the A/C begins to get warm. Under hard throttle, its as if the A/C cuts out and returns shortly after returning to normal throttle.
Do I have some kind of fan issue? There are no fan codes in ForScan Lite.
Thoughts?
Do I have some kind of fan issue? There are no fan codes in ForScan Lite.
Thoughts?
Laughing Gas
Joined: Jul 2011
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I had this issue a few years back where it was cold out of the vents and then not and it ended up being too large a gap between the AC clutch and compressor. I ended up pulling the clutch off and removing one of the shims and all was good after. There is a dimension for this gap and if it is too large the clutch has trouble engaging.
Rob.
Rob.
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From: NH
Thanks guys. Its strange how running down the road, its always fine. Gets cold and stays cold. Idling, it gets warm. Heavy throttle, it gets warm. Maybe somehow the condense is plugged up with bugs or something not allowing adequate airflow through it, but the engine never overheats and you'd think at heavy throttle the AC would be coldest, although I know some vehicle will temporarily declutch the compressor to help provide max power.
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From: NH
I'm going to check it. The one in my tractor is constantly getting plugged up by field chaff despite having a screen. I have to blow it out pretty frequently or the AC gets quite warm.
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Logistics Pro
Joined: May 2004
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The desiccant from accumulator comes apart and clogs the orifice valve over time. This very thing was happening to my truck on hard pulls or sustained acceleration, and the pressures seemed OK when checked at idle.
Good luck
Good luck
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Not difficult at all, The orifice valve is in the tube where the line goes in to the accumulator (or receiver/dryer depending on what you call it).
Given that your system is leak free and fully charged, the cost would be evacuation, cost of the valve (10.00) and vacuum/recharge cost.
I would definitely follow some of the steps noted above that could be part of your issue as well.
Given that your system is leak free and fully charged, the cost would be evacuation, cost of the valve (10.00) and vacuum/recharge cost.
I would definitely follow some of the steps noted above that could be part of your issue as well.
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From: NH
Thanks for the info. I must have some leak somewhere, since this is supposed to be a closed system and yet somehow I lost nearly 2lbs of refrigerant. Maybe its just a very slow leak. The shop that recharged it added dye to the system and said there was no dye already in the system.
Fleet Owner
Joined: Apr 2012
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From: Spanaway
Just tome general info.
New dryers have a dye built into the package. It's a disk that dissolves when the refrigerant is added.
I give you some more PDFs to read.
The condenser is the one that can be the issue when it comes to cleaning the system. You really can't
do an effective flush do to the way the core is built.
To change out the tube you will have to pump the system down and then refill it.
Fun Fact. It looks like they want to get rid of the small cans of R-134a (EPA and Washington State strikes again)
You could get a good UV light and take a look around the system to see if you see any places that glow green.
More than likely, it was a very slow leek. At this point I would just keep it in the back of your mind and check
every now and then.
New dryers have a dye built into the package. It's a disk that dissolves when the refrigerant is added.
I give you some more PDFs to read.
The condenser is the one that can be the issue when it comes to cleaning the system. You really can't
do an effective flush do to the way the core is built.
To change out the tube you will have to pump the system down and then refill it.
Fun Fact. It looks like they want to get rid of the small cans of R-134a (EPA and Washington State strikes again)
You could get a good UV light and take a look around the system to see if you see any places that glow green.
More than likely, it was a very slow leek. At this point I would just keep it in the back of your mind and check
every now and then.
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