Just noticed that upon start up and idle ac blows ice cold. 5 miles down the road it starts to blow warmer.

Bare with me as ive misplaced my manifold set. I did have a low pressure gauge from a long time ago.

Low pressure was would stay around 40psi then slowly over 5 seconds or so drop down to 20 hold for about 10 second and climb back up. All while just at idle.

That's after i added a can of refrigerant. After the second can it seems to have stabilized at around 40 psi. Which is still a little low for being almost 90* outside.

I know with just one reading its like reading a book and only reading every other page.

Here is my main question. Is the compressor suppose to cycle? I've always been under the impression it does. So i deemed a bad pressure switch possibly right off the bat. After doing a google search i see some are stating that it runs continuously.

The only time in a 15 min span my compressor kicked off is when i turned the control **** to "OFF" or when i unplugged the pressure switch.

Is this right? Seems like i would burn up the compressor...

 

It helps if you identify what you are working on...

If it's hot enough outside and the load on the system is high enough, it's perfectly normal for the compressor to run at 100% duty cycle.

 

Dang i forgot. I am so use to posting in the 6.0 section. 04' F250 6.0

 

Go check for excessive clutch gap. When the gap widens enough, the strength of the magnetic field, which diminishes with temperature increases, isn't enough and the clutch won't re-engage until everything cools down.

 

In cooler temperature yes, in hotter ones no.