Hello, Have the above heater which controlled by Screen Logic. Noticed on the last few spa heatings, the heater just shuts off before reaching set temp. Noticed it kicks off around 85F. It never kicks back on. I have to toggle the spa on and off using the Screenlogic app, then it fires back up and heats accordingly. I looked at the digital display on the heater and the temp is bouncing all over the place, before finally settling on a really high reading. Usually about 308. Then it eventually kicks off. Didn't notice any error codes. Guessing the Thermister was bad, so swapped it out, and even changed the high limit switch too. Didn't fix the problem. Thought I would ask here before I keep swapping parts. Perhaps thermal regulator? The display will sometimes bounce back to reading a correct temp, but just for a second, then goes back to 300. I will add that I let my filters go too long between cleanings. They were quite dirty. Chems have all been fine all winter, just slacked on filter cleaning. They are fine now. Any ideas on what to swap out next?
