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Old Apr 22, 2011 | 10:24 AM
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AC

Ac blows cold for 10 minutes then blows warm. Turn it off wait 5 to 10 minutes, turn it back on blows cold again for 10 minutes, then hot again. I have charged up the system but it didn’t resolve the problem. Anyone have answers..
 
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Old Apr 22, 2011 | 06:40 PM
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Start with the HVAC FAQs in the HVAC section of the forum. While it was written for the f150, most of it also applies to the Super Duty line.
 
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Old Apr 22, 2011 | 06:52 PM
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When it starts blowing warm, can you still hear the clutch kick in and out?
 
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Old Apr 22, 2011 | 07:43 PM
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Smile

what is your selector on? MAX or lower. Its sounds like you are freezing the evap try to set your selector at its lowest if it cools without switching to heat work your way up on the selector until it repeats the heat. also you have to take into account outside temp and humidity.
 
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Old Apr 23, 2011 | 07:16 AM
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Its the same on low or high. Thanks
 
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Old Apr 23, 2011 | 08:15 AM
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Open the hood and LOOK at the compressor clutch to see what it is doing when the air goes warm. Look at the accumulator can to see if it is excessively frosted (indicating possible evaporator icing).

We can't see or hear your truck, so YOU have to be the eyes and ears to provide information for us to assist otherwise you can just take it to a shop for diagnosis and repair.

You DID read the FAQs, did you not? They contain information about the common failures of the HVAC systems on the F-series trucks and can help you get oriented in defining the problem.
 
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Old Apr 23, 2011 | 04:43 PM
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Yes I did thank you, I will try a few things and see if it works.
 
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Old Apr 28, 2011 | 06:21 AM
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Thanks all,
I gave the clutch trick a try and it worked!!!! Their was only 1 ring made it sooo easy.
I love that I learn something new. This site gives good advice. I grew up with a mechanic father, and was forced to learn the basics. As a woman it’s so easy to get taken advantage of. I've noticed to that some men look at you weird when you talk like you know something..HEHEHEHE

This is the second time I’ve pulled advice from here, I will be back..

Cowgirlcadilac
 
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Old Apr 28, 2011 | 06:54 AM
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Congrats on getting it fixed.

Thanks for following up.
 
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