During the summer my AC was good but there were a couple times when it wasn't cold and that was during the evening but went back to normal operation the next day. Recently I turned on my AC and was not cold again. After several attempts on different days it was still not cold. What could it be?

 

Could be low on Freon... sometimes they are shipped/sold that way to be "cost effective"
But many people have complained these trucks just dont get very cold and the ac sucks...

 

Agree that a good start would be to check the freon level.

Another consider may be if you're in an area of high humidity - a lot of the cooling is consumed condensing water.

Also, could have a control damper problem, in that all the airflow is not being directed across the evaporator coil.

If everything checks out, consider using the Max A/C feature. The R134 systems just don't seem to have the ability to freeze one out like the old R12 systems, but they should still be designed to be adequate.

 

Mine had the same problem. Took it into the dealer and one of the hoses was loose and it lost losing the freon. Thighten it all back up, and filled it full of freon and she is ice cold.

 

Thanks for the advice fellas.

Also my AC shuts off by itself several times a year. It'll just be running and then turns off. Then I turn it back on it have different settings. Does this happen to anyone else? Is there a fix for this?

 

that could be it because i also suffered the dreaded ac not cold enough curse until we did a evacuate and recharge in my class and now i feel like its a meat cooler

 

good point, InCuBuS, there may be moisture in the system, freezing up, causing the intermittent shutdowns.

goodwood- just to verify - when it shuts down, is it just the cooling, or does the fan go off also. If the fan, then may have a head unit problem.

 

Mine had the some problem last year. took it to the dealer to check the hoses and they were all fine. So they replaced the front controls and said it would be $1000. Had 43000 mils so no warranty . Went to pick it up and they replaced it and charged me $40,and charged the warranty that I did not have.

 

When it shuts down, the whole thing shutssdown, the display, cooling, fan, everything. It'll be on like 64 degrees and when I turn it back on it'll be on 78 degrees.

 

The display on your HAVC needs to be replaced But you have no warrenty So when it happens again Take the negative cable off of the battery for about 10 min This will reset the HAVC control

 

This works or you can just pop the trim off and unplug the HAVC controls manually. Now you don't even have to pop your hood. I had this problem in my 2004 F150 and after doing it this way it never had a problem again. Weird.

 

Maybe the connectors weren't connected or pushed in all the way. Who knows what games they play at these factories...

 

Well I had my battery replaced yesterday so it was out for at least 10 minutes. Hopefully I won't have anymore problems. I'll post if the problem reoccurs.