Should have known. In the previous question, I asked what was wrong because I had unhooked the air lines from the heater AC control valve.
I only had the floor heater vents working, and the defroster, center and side vents not working.
I started the engine, then all worked fine. Looks like you have to get air to the lines again. When I unhooked the lines at the control unit, it completely bleeds the system. All fine now, no fish today.
Thanks anyway,
Boatman