I have a 2004 Cove that I bought used about two years ago. It has been running great since start-up, but about one week ago, the heat will not go above 86 deg. The display is reading correctly, and the heat light will come on and go off when heat is called for (at 86deg or lower only). Also, all the controls for the jets work properly and the program can be modified. The only obvious problem with the display is three lights blinking and the fact that I cannot raise the temp above 86. Any help or suggestions would be greatly appreciated.
The tub is running on a 120 volt circuit with GFCI and this has not been a problem since start-up.