So my a/c will blow cold and fine for a while, but then after a while 'sometimes' it'll start blowing warm as if the compressor stopped. If I checked, the low side line will be warm/hot unlike cold and wet [from humidity] when running normally. Would this be along the lines of needing to add refrigerant or needing to let some out? I know it was overcharged at the end of last summer and some was taken out. I'm thinking it's still a bit overcharged.

2004 5.4

 

Sounds like it is undercharged and has a leak. Take it to a shop, have it evacuated and recharged after leak tested.

 

thx for quick response