Bought what I'd guess to be an old Hot Spot SE from an old acquaintance's Craigslist ad. My parents had a fancy Hot Spring model when I was a kid so I said "how hard could this be?" Turns out hard when you know nothing about the hot tub. I can't find an owners manual online. There isn't a digital thermostat to know the temp settings and I don't know if it has a temp sensor to heat or if the jets need to be running. Anyone else have one of these oldies?