Wow thanks everyone for the help. It is the actuator and is a compool cva 24. I had the pool on spa mode the day before with the kids swimming and when we got done that night I turned everything off. So when the automatic control took over Sunday morning it drained the hot tub as the actuator did not work.
FWIW, I took the handle off the actuator, removed the 4 screws, and put the handle back on, and manually turned the valve. That took care of my problem and everything is working manually now. Yeah, that will keep the green stuff from beginning to grow!
I will go buy and actuator and replace it this weekend. I guess with everything being electronic now days I never learned how to actually operate my pool. (really I still don't know but I am getting better)
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