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Old 06-26-2019, 07:35 PM   #1
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Ford Air Conditioner problem

We have a 2011 Ford F350 with a 6.7 turbo diesel. We are having a problem with the air conditioner. It will start out great, then the air flow seems to become restricted. We can hear the fan still operating, but little cold air comes out of the vents. If we turn it off for about 5-10 minutes, my DW can feel a few drops of cold water on her feet, and occasionally a few very small chips of ice blow out of the vent. when we turn the A/C back on, it cools great for anywhere from 10 minutes to an hour, then the cycle repeats. Can anyone suggest what's wrong, or a solution for how to fix this? Thanks
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Old 06-26-2019, 07:57 PM   #2
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We have a 2011 Ford F350 with a 6.7 turbo diesel. We are having a problem with the air conditioner. It will start out great, then the air flow seems to become restricted. We can hear the fan still operating, but little cold air comes out of the vents. If we turn it off for about 5-10 minutes, my DW can feel a few drops of cold water on her feet, and occasionally a few very small chips of ice blow out of the vent. when we turn the A/C back on, it cools great for anywhere from 10 minutes to an hour, then the cycle repeats. Can anyone suggest what's wrong, or a solution for how to fix this? Thanks
Sounds like it's icing up. Have the refrigerant level checked to start..
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Old 06-26-2019, 08:13 PM   #3
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Somehow I suspect the Ford F350 Forum will have more experts than a Forest River campers forum. Just a guess.

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Old 06-27-2019, 08:03 AM   #4
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Thanks, I'll check them out
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Old 06-27-2019, 09:35 AM   #5
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Somehow I suspect the Ford F350 Forum will have more experts than a Forest River campers forum. Just a guess.

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Yep, my thoughts exactly. If someone over there had an RV question, I'd send them here. Here is the SD forum specific to your year of truck.
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Old 06-27-2019, 10:23 AM   #6
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Sounds like the charge is low and it’s freezing up the evaporator go have it charged or buy the do it yourself kit and you will be good to go.
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Old 06-27-2019, 12:44 PM   #7
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We discussed this over on Ford Trucks Enthusiasts, and your symptoms sound a lot like what's addressed HERE:

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Old 06-27-2019, 01:39 PM   #8
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My money is on the evaporator temperature sensor.
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Old 06-27-2019, 01:45 PM   #9
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It's icing up and could be low on freon or a bad sensor as suggested.
My vote is a bad sensor. The compressor should cycle on and off. If it's staying on it will freeze up.
In the mean time you can try running it with higher fan speed and be sure recirculate is OFF.
Good luck!
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Old 06-27-2019, 03:11 PM   #10
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I had a similar sounding problem with my F250. Dealer said it was a cracked evaporator and said it happened a lot with F250, 6.7s. Mine was still under warranty so it was corrected. It happened when we were on a trip and we were in DC on the bypass, middle of summer and very hot but the AC just was not working. I could hear ice falling when I stopped to fuel up sometimes but finishing that trip with no AC was not fun. Went to NJ and then returned to FL.
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Old 06-27-2019, 06:29 PM   #11
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Thanks for all the suggestions. You've given me lots of things to check out when we get home.
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Old 06-28-2019, 03:49 PM   #12
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Quote:
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My money is on the evaporator temperature sensor.
Could be a few things as mentioned in here, but if it has a low temp sensor in the system that would be the first thing I would check if I was fixing it myself.
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