I have a 1987 Sundance Series 604 that won't get hotter than 95.5 degrees. I have replaced the element, the pressure switch, the high temp limit switch, the temp sensor (cracked) in the filter well, the control panel, and the doors. Polarity and ground are correct, filter is clean and it is set for 240 volt. Any ideas? Spa companies in area suffer from worker maliase (might as well ask the guy in the walmart pet isle with the hypno contact lenses) and are no help whatsoever. Really would like it 101 to 104 by Christmas.