2004 F-150 Heritage AC

[kenlou]

He was going to use this in his 2004 but he sold that truck so he still got the stuff. It’s all brand new.

[kenlou]

I took a little time to look at the truck today. Just for my own curiosity:
I removed the two caps from both ports and depressed one of the schrader valves and got absolutely nothing.
I pulled a vacuum for 45 minutes. It went to just below 30 in a matter of one minute. What does that tell you?
Within 3.5 hours it had gotten to 20.
I’m going to have to find out how to locate the condensate drain and see if there is anything I can see from there.
I also think there may be an issue with the blend door.
I do have a FOUR UNCLES AC Flush Kit and flush fluid that I used on an 86 Corvette conversion that I got a lot of help from this forum a couple of years ago.
Just out of curiosity, I think I am going to get that OT out to see what I might be looking at.

[JohnHere]

I removed the two caps from both ports and depressed one of the schrader valves and got absolutely nothing.
I pulled a vacuum for 45 minutes. It went to just below 30 in a matter of one minute. What does that tell you?
Within 3.5 hours it had gotten to 20.

The system has a leak...somewhere. It fails to hold both vacuum and pressure.

I’m going to have to find out how to locate the condensate drain and see if there is anything I can see from there.

If the system has fluorescent green UV dye in it, you might be able to detect traces of the dye in the condensate, indicating a leaking evaporator.

Just out of curiosity, I think I am going to get that OT out to see what I might be looking at.

Good idea. See an earlier post about the OT.