Q: I have the Sta-Rite model number SR400NA for both pool and spa, for almost 7 years. Lately, the unit has turned itself on when there is heavy rain or snow. I reside in Las Vegas and have never had this problem before -- and this has happened twice this year.
A: It is most likely the control panel itself. The panels have been redesigned and now come assembled with the plastic top of the heater so they are sealed better. so you may find the clear cover is not enough. If you still have issues you may want to try the part at the link below, I attached a picture of it to this email: