Two weeks ago I began hearing a noise - sounded like a knocking/grinding - I honestly didn't know if it was coming from the hot tub or a woodpecker! Last week I had the code heater flo failure. I shut it off at the breaker, turned it back on, and the error has not come back. I've noticed the water pumping out of the circulator seems hotter than usual. Everything seems to be working fine - hot tub is keeping its 104 temp, jets are working, etc. I looked in the manual and changed the filter, opened all jets, etc. This week the noise is different and more of an opening/closing noise each time the circulator pushes out the hot water and stops. Again, no errors. Attached is a video - if you listen at the end you'll hear the noise I'm talking about.
