AC Recharge

[TexasAggie09]

AC is not my strong suit so bare with me here. If I open my system today (after evacuating and capturing the 134) to replace the orifice tube and draw a vacuum on it, do I need to re-add any oil/a first charge or can I just go right in with the regular 134? Thanks!

[AD5GB]

Provided it has the correct amount now and you don't lose any evacuating the system, no additional oil should be needed. I haven't gotten around to responding to your other post yet but did you find out where the fixed orfice tube is? I've been thinking about this a bit and I don't recall if you did this or not... I need to go back and reread the whole thread, but I'd be inclined to try a pressure switch before opening the system again just to save the hassle in the event it's not the orfice tube. They're less than $20.