Have a small Dimension One Interlude, about 12 years old, used about every night, second heater, second controller and second motor, but it developed a bad leak, losing about 6" of water a night (250 gal capacity). Went shopping for new spas, but dissatisfied with configuration. As a last resort, removed the filter and dumped in Fix-A-Leak. Seems to have worked! Drained, refilled, cleaned filter. It now seems to good to be true, EXCEPT the thing does an auto-shutoff (after several hours) and gives a "pressure switch" code. I've tried adjusting the switch....interestingly, if I do it while the juice is on, the thing will turn on, whether I'm turning in or out!? Think I should just replace the switch? I cleaned the filter again...when the thing is working, it heats fine (maybe a tad high? no change on turning down the temp) and pump/jet seem to work fine otherwise.