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  #1  
Old 06-03-2011, 07:38 PM
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a/c not working right

I have a 2002 f350 I have put some cans of freon in it but it will blow cold air when I have it in max ac and the blower on high but when I change it to regular ac or the turn the blower down it will work for a for 2 min then it blows warm so I turn it for about 5 min then turn back on to max ac and the blower on high and it stays cold the rest of the time any help will be appreciated thanks
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Old 06-03-2011, 08:24 PM
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are you moving when this happens? The condensor can get heat soaked and not blow cold until you are driving again. Did you check the freon pressure?
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Old 06-04-2011, 05:51 AM
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I'm driving when it happen and I check the pressure with the gauge that comes with the can I buy at auto part store , it was low but it blows cold air sometime and if the freon is low would it always blow warm air and never cold .
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Old 06-04-2011, 12:00 PM
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My ac blows cold for like 2 minutes when I first start the truck then won't work again till I restart the truck. It's annoying.
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Old 06-04-2011, 03:14 PM
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Yep mine is annoying but atleast I get ac but full blast the hole time but its better then nothin cause I work out of ny truck I don't want pay to put it in the shop so I will look around the internet and try to find a solution
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Old 06-04-2011, 03:16 PM
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The way you check pressure is with the ac set to max, with the compressor engaged. If the pressure slowly goes down until the compressor kicks off, then back up until compressor comes back on, you are low on coolant. When the AC is blowing hot have you pulled over to check to make sure the compressor is engaged?
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Old 06-04-2011, 03:17 PM
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Check the clutch. Mine will disengage and won't kick back in unless I smack it with a screw driver. It will stay working if I leave it wide open. I've been told that you can take a shim out of it but I haven't checked yet
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Old 06-05-2011, 09:43 AM
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It started to blow warm so I pulled over and the ac was not engaged I will try the wack with a screw driver next time
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