This is what is happening....
After changing water and cleaning spa that top blew off and became a mess with leaves and small sticks after a big storm....I got this problem.
When power was restored, it came on great, heated. pumps worked and blowers blew for about 6 hours and then it started running several seconds at a time and shutting off for several seconds. It repeated this over and over. When I shut off the power for an extended amount of time, it starts this process over again ( good for 6 hours, then shutting on and off every few seconds)

DM industries suggested replacing the control panel, I did...same problem.
I have not gotten an error message in this process.

Could I have debris in the flow that would cause this. I keep thinking of the mess I had after the storm I mentioned. I have had one repairman out and He could not see "a problem"...he was here during the good 6 hour phase. I've called him out again but I think your advise might be a better shot for me.
Thanks in advance!

could you explain: further?

Thanks for reading the post.
My spa heated and the jets worked fine for about 6 hours and got up to 97% or so...the spa then clicked off ( lost all power and function) and then after a few seconds, it clicked back on and flow began...a few seconds more and it kicked back off ( no power at all).
The same repeats happen even when I have the jets on. It will do this cycle for as long as I have power connected.

If I disconnect power ( pull the circuit) and let the spa sit for a day, It will start this process over ( 6 hours or so of perfect then the kickin on and off happens)

Thanks for thinking about this one:)