I have replaced all the sensors and thermal regulator. Unit heats but heater starts and stops and makes a rattling noise inside and shakes before shutting off. Resumes heating for a few minutes and repeats. What else could I check or replace?
Ask the Pool Guy Changed status to publish May 19, 2022
Based on this question, here’s Mark’s reply. His thoughts are to descale the heater as the next troubleshooting step.
Ask the Pool Guy Changed status to publish May 19, 2022