Pool and Spa
Questions about Pool Repair? Ask an Expert Online.
well it sounds like a communication error between the circuit board and topside. I would replace the topside as it is much cheaper than the board and most likely the issue with what you are describing. Without as replacement part there is no way to test which it is so go with the cheapest first.
Ok I will opt out but you can not expect a detailed troubleshoot over the internet. The topsides are not designed for any homeowner to fiddle around with the control circuitry if you were a spa technician you would have a test panel etc to properly diagnose the issue but without it you can only remove and replace. Good luck and I hope another expert can help you.