I'm having an electrical issue with my Softub that's similar to this. Last week I went out to use the tub and it was flashing between 'P' and 'SP1'. I didn't know what the SP1 code was until Googling it since it's not in the manual that came with the tub (it's special temperature mode), so I don't know how it got into that mode.
Pressing any of the buttons on the controls wouldn't do anything (jets wouldn't come on, lights wouldn't come on, temperature buttons weren't working, etc.). I unplugged it and plugged it back in, and it only showed 'P', but the buttons still weren't working. The lights actually came on after pressing ANY of the buttons multiple times, which was very strange. I left it overnight, and magically the next day everything was working again.
Then later that night, it started doing the same thing flashing between 'P' and 'SP1' and the buttons wouldn't function. And again the next day everything magically worked again and it was working fine for about a week.
Then yesterday it snowed, and now it's having the same issue again, so I'm thinking it could be a moisture issue with moisture getting into where the circuit board is on the control panel?
Has anyone run into a problem like this before? I was thinking of letting it dry out to see how things go and then caulking around the outside of the control panel on top of the Hydromate, but I don't know if that's a bad idea?
Here are a couple of videos I took showing the issue:
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