Hello ew have a CAL SPA (don't know the model #)from around 2004. It stopped heating, so we went to a spa repair shop and they sold us a new heating element and a little switch of some sort on top of the heating element with 2 wire connections. I removed all the old parts and replaced them with new ones. The pumps work, I did flush the entire system and the digital display seems to allow me to raise the temp... however it does not heat beyond around 75 degrees or so... Any guidance is appreciated. Please e-mail me at [email protected]