Follow-up to my situation is that my PB came by on Saturday (!!), the day after all this happened. Didn't seem at all surprised and immediately said he'd replace the control panel. It made me believe there may have been some truth to what the electricians suspected at installation.

New control panel arrived last night and the electricians hooked it up today. I got about an hour's worth of generating and then the same thing happened, although this time my water temperature reading was supposedly a mere 153 degrees . I took down all my diagnostics and called Goldline. As soon as the rep heard, "hot," she said I had a bad cell and they'd send me a new one.

So, it's continuing on with manual chlorination for the next week - or so. Although it's a bit frustrating to have to deal with new equipment not working correctly, I must say I'm totally impressed with Goldline's customer service: got right through to a rep, had a non-outsourced rep I could understand, and received an immediate response to my situation.

Now, I'll keep my fingers crossed that the new cell arrives in a timely manner and solves my problems.