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AC Going out or normal operation?

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Old 07-27-2007, 03:08 PM
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AC Going out or normal operation?

Hello all.

I have an 05 F150 Super Cab (The one with the back seat and the 1/2 door, sorry I get them confused) with about 30k miles on it.

First off the ac doesn’t seem to be that cool. I have tried suggestions found on here of not using the max setting with recalculate on and it was better. But now what I am experiencing is that while driving or sitting at a light, the air would go warm and moist like the ac just kicked off. It will stay off for 30-45 seconds and then kick back on.

I heard that they were shipped with varying levels of coolant so I am not sure if I need to go ahead and have it looked at or is this normal.

Thanks in advance for your time!
 
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Old 07-27-2007, 03:49 PM
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I would deff. get it checked out by a mechanic. I know most a/c pumps have a saftey in them that will stop the clutch from running when low on refridge or oil. It might just be on the borderline thats why it only stops for a short time. I would say just fill it up with some refridge that you can buy at any auto parts store if its r-34a but if there is a leak you would just be throwing your money away. Good luck with it.
 
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Old 07-27-2007, 04:49 PM
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Before you mess with it, it sounds like it is still under warranty, I would take it to the dealer and let them fix it before your warranty runs out.
 
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Old 07-27-2007, 06:08 PM
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Could be low freon tripping the low pressure cut out switch - that would explain a number of things, but definitely have it looked at under warranty.

Also i'm a bit confused on the "not using max setting with recirculate"

The maximum cooling will be when you set the AC to "MAX" - which automatically kicks in the recirculate. This is also identical to running in "normal" with the recirculate manually turned on.

The air might get a little colder with the fan turned down, but the maximum "btu's" of cooling should be with the fan on high and AC set to MAX of manually on recirculate.
 
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Old 07-27-2007, 08:49 PM
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Thanks!

Thanks for all the advice. I will have it looked at soon.

I read on here that some people reported better cooling not on max but with recirculate manually turned on. I did not notice a difference.

Tomorrow I want to do some temperature readings of my own at various times either idling and while driving for my own curiosity.

I will let you know what the service department says.
 
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Old 07-28-2007, 01:40 AM
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Question

My 07 a/c acts strange too.Sometimes it starts blowing warm air then goes back to cold.I have a thermometer in the vent and it usually reads 38*,but it sure don't feel that cold.I have 5% tint on all my windows so the sun coming in is ruled out.My old 97 F150 a/c would blow so cold I could hang meat in it.
I have an oil change coming up soon so i'll ask them (Ford dealer) to look at it.
 
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