Well, I think the monovalve is ok. After spending some time with it, it just takes a while for the hot water to clear out of the system and go back to ambient air.

It appears the CCU is working ok as far as the heat is concerned. Now I want to know if it is sending the proper signal to the compressor and all that. Problem is I see some unplugged sensor on the drier and an unplugged connector near the compressor. Where can I look to see how the electrics are hooked up to all this?

I can hear a click from the CCU when it activates the heat, but I don't hear anything when I turn it to cool. Should I be hearing something?