We tried everything to squeeze a little more life out of our 18-year-old Dimension One Spa, including replacing the heater. Sadly, too many things were failing at the same time and we had to give up. This heater ran for no more than a couple of weeks and should still have, by our experience, at least another eighteen years of life in it. We're including a new low flow sensor free.
HydroQuip Dimension One Spas Heater Replacement