chrison600

Hi everyone and thanks for your responses. I thought I'd post back to update that cleaning the filters did the trick. My assumption is that there wasn't enough flow through the system, so the heater self-protected itself from an overheat by simply shutting off the gas supply... Chris

Hi all, I have a pool with integrated hot tub that has all Jandy equipment (filter pump, filter unit, heater, chlorine gen) as well as a Polaris powered by a booster. We don't use the heater a whole lot, only when we use the hot tub. It's run great since new (about 4 years ago), but last night threw an AGC error after heating the tub to about 95 deg. If you reset the heater and fired it up again, it would go through its start up routine, try to heat the water (burners would light and fan would run for about 5 seconds, twice), then it would throw the AGC error. I read through a few forum posts (that's how I found this forum) and it seems that the official Jandy recourse was to clean the filter or determine cause of pump oscillation. Does this generally mean that my filters need to be cleaned/changed because they're not allowing enough water to flow? Thanks, Chris