Hi Frank:
Quote"I'm thinking it is a problem with air or water with the valves.." I don't think that is the source of your problems.
Is there any electric current reaching the valves? Do the other valves work from the controller?
I'd suspect a short. Since you can activate the valve withthe bleed screw, I suspect an electric short.
If problem at more than one valve, check for short in common.
Let us know what you find,
Jeff