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Ok. The problem continued today. I tried to flip the switch under the actuator, but that didn't make change. I repeatedly turned on and off the system to see if that makes any changes. And at one point, it actually worked (I don't know what I did differently for that) and moved the valve, but...

Thank you very much for the replies. I have only one actuator. I've toggled the switches while the solar is activated but it didn't make any changes. I also examined the wire from the actuator to the controller but didn't find anything specific. I haven't checked the motherboard yet. Then...

Hi, I have a solar heating system with Pentair SunTouch controller with Pentair CVA-24T valve actuator. When I swam a few days ago, everything worked fine then. But this morning I noticed that even though the controller activated "solar", the valve didn't move. I turned off and on the pump...