Hi Kenny
We have and sell Euphorias and I am sure the problem is just the water level is a little low. If we let the level drop to half way up the fins , the suction will draw in air and lock up the system - this will shut down the heater on its pressure switch.
Kep your water to just under the skimmer lid and it will function much better , though the water will go above the lid when you get in.
Great tub ....
Enjoy