Not sure. It was at around 2600 rpm's. I bumped it up to 3100 last week on advice that could be the problem. Would you suggest adjusting the RPM's back down and rotating that valve?If you rotate it 90 degrees, that will close the valve and force all of the water to go through the heater.
What is the flow rate that you use?
Alright! I think I'm in business. I turned the valve the 90 degrees and the heater ran (in pool mode) for a good 5 1/2 minutes with no problems. I"m out the door for the day, but I will run it again as soon as a I can, and in spa mode, but I think it's working. Thanks for the help!Yes.