Well, it's obviously a learning process for me, but I'm getting there.

Here's what happened: I closed both valves and hooked them up to the high and low sides. Then I opened them and recovered the refrigerant. That went well. I then pulled a vacuum on it for 45 minutes. That went well.

With the car off I then set the unit to dispense the correct amount of refrigerant. Twenty two ounces were sucked right into the system. Very nice at this point. I still need 16.75 ounces to go in. Well, at this point I get an error code telling me the pressure is too high. So I shut it down.

I wanted to call it a night so I closed both valves at the hose ends and detached the low side from the car. I went to detach the high side, but it's way too hot! So I'm letting it sit for a while then I'll take it off and start back up in the morning.

Now, since I had that high side hose open when I was charging the system, do I need to start over again with a recovery, vacuum and charge? Or, do I pick up where I left off?

Thank you for your help.