When the spa is in economy mode and the second filter cycle becomes active----I have no primary pump or heat. Spa shuts down with error FLO. Second or PM filter cycle turns on ALL pumps and air. AM filter cycle works OK and primary pump works any other times. I hope I explained the problem well. Basically, the spa works in any situation but the second (PM) filter cycle when in economy mode.
I think it may be the computer chip. I found the chip, but it needs to be programmed (or flashed). Anyone know if there are chips already programmed or someone to do the job? The chip is a Motorola p/n# MC68HC705C8CP. Any other info needed?

Thanks Wayne

This unit has been out of production for quite some time, doubt you'll find any takers on the info needed.

Wish this forum could've been more help Wayne,
But find anyone with the ability to provide the source code to flash a nowadays non-existent system would be a miracle.

Thanks. It was worth a shot.