tbirdtbird, I'm inclined to agree. For anyone needing home heat or home a/c help, I'd direct them to heatinghelp.com; another incredible site, FYI.

Ackits.com and this forum is now my go-to and I will keep sharing with anyone who needs auto a/c parts.

And yes, GM Tech solved the issue, thank you GM Tech!!

Hey Tim,

It is up and running and working very well, thanks to all of the help I have received here. Glad you encouraged me to wait before buying additional parts!

Peace,
Mike

Thank you. I already did that and I'm confident it's thoroughly clean. However, if I'm wrong, time will tell.

Found the condenser had an 'extra' OT in it. Removed it and finally pulled the system into a vacuum last night and charged it. It is now working well, front and rear. In retrospect, I have no idea why the front worked at all after the first charge and I wonder if the rear TXV that we drilled out to ...

Thank you for the lead to the cause of my high head pressure and for the assurance I need only one OT.

Waiting now for the vacuum pump so I can try again. I'll report back the results.

Many thanks, everyone.

Yes, that's correct

Roger that. If I leave the OT in the condenser, than both front and rear evaps will be controlled that OT. That may work for the front evap, but not for the rear, as there's a TXV before the rear evap and having them both control flow, I don't think would work correctly. I removed the condenser OT a...

Thank you, Tim.

Though a little blurry, the OT appears to be OK. With the other OT removed, do you think the system will operate correctly now? In other words, do you think two OT's and a TXV were enough to cause the high head pressure?

Thank you to Tim, and everyone else who replied.

Just emailed them, Tim. Thank you