I just brought home a "free" hot tub this week after driving 200+ miles round trip. I'm an Industrial machinery electrician by trade so I should be able to fix this one. P.O. said it was displaying fault code for Over Temp but water felt fine so I'm guessing bad temperature sensor. It still had some water in piping when I loaded and hauled so hopefully no cracked pipes as we've been below freezing for weeks.
13x27 Splash Pool A.G., Sundance Marin 850 spa