Got a call from a customer who tells me that his 2 hp 2 speed pool pump motor will run on high speed, but when he switches to low speed it shuts off after 10 seconds or so. It will continue to run on high speed but the motor gets extremely hot. I am only assuming that it is tripping the thermal cut out.But then how can it still operate if the element is open? Tells me that he can't read the pump info except that it's 2 hp 230V. Will go over in the A.M and look at it, any thoughts? Thanks.