AC - Ford Powerstroke Diesel Forum
General 6.7 Discussion (2011-2016) General 6.7 Discussion

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post #1 of 10 Old 07-10-2019, 04:44 AM Thread Starter
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AC

I seem to have found a issue with my AC. It works fine till the outside temperatures are in the 90s and then it does not work. I have refilled it, but that did not help.
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post #2 of 10 Old 07-10-2019, 04:52 AM
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Probably your fan. Can you hear it turning on?
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post #3 of 10 Old 07-10-2019, 04:54 AM
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I have the same issue as well. It works fine until the temperatures gets to around 90 degrees or so. When moving, it works fine even in the hot weather but once I stop at a light or in traffic, it isn't nearly as cold and I can feel myself start to sweat! I had the dealer check the pressures and they're okay but I do need to be sure the fan is clicking on.
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post #4 of 10 Old 07-10-2019, 05:21 AM
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It's probably your fan. Your fan is the item that keeps the coolness circulating while stopped. So if it's 90+ and you're not getting cold while stopped, it's your fan..
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post #5 of 10 Old 07-10-2019, 05:32 AM
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Originally Posted by jman37 View Post
It's probably your fan. Your fan is the item that keeps the coolness circulating while stopped. So if it's 90+ and you're not getting cold while stopped, it's your fan..
Is that a common issue that it doesn't come on when the AC turns on? I've done a forced regeneration before with my FORscan and the fan definitely came on for that. The whole AC issue has really been an issue since I bought the truck brand new, hence why I had the dealer check it out.
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post #6 of 10 Old 07-10-2019, 06:22 AM Thread Starter
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by fan you mean the engine cooling fan, not the blower fan right. also it did not matter if i was driving at highway speed or stopped
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post #7 of 10 Old 07-10-2019, 07:37 AM
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Originally Posted by HyOctane23 View Post
Is that a common issue that it doesn't come on when the AC turns on? I've done a forced regeneration before with my FORscan and the fan definitely came on for that. The whole AC issue has really been an issue since I bought the truck brand new, hence why I had the dealer check it out.
Not sure if they're separate for that, but to me your issue sounds like it's fan related. Fan should come on automatic with the AC on.

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by fan you mean the engine cooling fan, not the blower fan right. also it did not matter if i was driving at highway speed or stopped
Your issue sounds like you have something else. Can you hear the clutch engage when it's on?
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post #8 of 10 Old 07-10-2019, 09:42 AM
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Quote:
Originally Posted by HyOctane23 View Post
Is that a common issue that it doesn't come on when the AC turns on? I've done a forced regeneration before with my FORscan and the fan definitely came on for that. The whole AC issue has really been an issue since I bought the truck brand new, hence why I had the dealer check it out.


FWIW I donít hear the cooling fan any different than when the AC is off. Kind of a weird issues if the pressures are checking out to be ok. Iíd be more inclined to think itís an issue with the blend door.


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post #9 of 10 Old 07-10-2019, 01:32 PM
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Just for the record, you will always hear the fan turning. These trucks have viscous fan clutches that will always turn, but when they go bad will not lock up like they are supposed to, which wonít give you enough air flow over the condenser.

So if itís a fan problem, itís the fan clutch.
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post #10 of 10 Old 07-10-2019, 04:26 PM
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Quote:
Originally Posted by Old King Coal View Post
Just for the record, you will always hear the fan turning. These trucks have viscous fan clutches that will always turn, but when they go bad will not lock up like they are supposed to, which wonít give you enough air flow over the condenser.

So if itís a fan problem, itís the fan clutch.
Mine failed locked on. I just replaced it about a week or two ago. Realy an easy job. Remove shroud around fan. Loosen 4 bolts that hold fan on. Use air chisel to bust clutch nut loose, and spin it off. Reverse operation to install new one. Old clutch was ruining my mpg.
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