We have a Hot Spot SLX TRA 2003 hot tub. It seems to work fine sometimes but when we turn up the heat with in a few hours of getting in and then turn the jets to high speed it will then shut off and flash *** on the panel. I am able to get it to stay running for a little while by removing the filter and allowing the water to flow through unrestricted but eventually it will start shutting down. It will come back on after 30 seconds and then shut off after a minute or less continuing this cycle as long as I leave it on high jets. If I leave the jets on low I have no problems. It seems to heat fine and run the filter cycle fine. Sometimes it works fine when just my wife and I get in but it always seems to act up when we have more than just the two of us in it (I don't know if that matters or not). When it does work on high all the jets seem to operate at full capacity.

I replaced the pressure switch on the heating element tube and this did not help.

If anyone has any suggestions of what I should try next I would greatly appreciate it.

Thank you