Greetings,
we have been struggling with this issue since last Sep.
It has happened every time we use it, for a total of about 10-12 times.
The symptoms:
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The jets go out first, about 30 seconds later the interior light goes out, and then about five seconds later the control panel goes dark. i.e. seems like a very purposeful shutdown process
The control panel then goes to a flashing red power light and nothing else is on or works.
Actually, the blue light over the control panel continues to work.
The circulation pump (bubbles) also continues to work.
Sometimes it takes several hours to happen, but sometimes <10 minutes.
Most of the times, I have been in the tub, with the lights on & the jets running.
Yesterday, it happened with the hot tub closed up for the first time.
(hasn't been used in a week)
Can't say for sure, but increasing the water temperature (to force the heaters on) seems to exacerbate the problem.
Toggling the 30 amp breaker for jet pumps will remedy the problem temporarily.
Tried / Tested / verified:
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Had the heater/control board replaced. (Oct)
Had the hi-limit thermistor replaced. (Nov)
Waxed filter compartment door with a candle.
Connections to control board are solid.
Today I put a video camera on the filter compartment door, turned on the lights, all the jets, and cranked up the heat. Reviewed the video to confirm filter compartment door was open and water was flowing well at time of shutoff.
Cleaned all the filters.
Any other suggestions?
Thanks,
n8