003trublugt315

I just finished doing a 5.4 swap into my 2003 GT. My AC blows out hot air when turned on. I purchased a can of R134 with a pressure gauge to check the system, but the gauge shows normal at first and then the gauge continues to rise until it is in the red (caution).

Anyone have any answers to what the problem could be. AC did work at two different times after I completed the swap. Since then it has been hot.

Thanks in advance.

02TorchRedGT

Is the AC clutch kicking in?

BTW Congrats on your 5.4 install....bet that thing runs nice

tim2002gt

Maybe you popped the fuse. Sometimes it can be just a simple little thing.

003trublugt315

I don't hear it kicking in. What would cause it to not kick in.

Thanks, it was a painful process, but it is worth it.

003trublugt315

Is there a fuse that controls the AC? I thought that might be it the other day, but all of my fuses are good.

mustangchris09

this happened to me before and its most likely the fuse or it could be one of your speed sensor's for your cooling fan, you have two the normal low speed and the high speed for when the air is on. See if the fan kicks on when you turn the a/c on, if not thats your problem. SInce your fuses are ok id say that may be whats wrong. That swap looks insane by the way[8D]

003trublugt315

Thanks for the info, I'll try it out. Thanks about the swap too.

MurfGT00

the ac system might just need to be charged. take it somewhere you know the people and have them check it.

003trublugt315

The pressure is in the warning zone when i checked it; don't think it needs to be charged.

I G Joe

where did you get the 5.4 3v?