I keep getting a DSI fault light coming on when using my waterheater. It will heat up the water just fine on electric, gas or both. I have put the switch on electric only and get the fault, I can put ...
Water heaters get too hot when the thermostat does not shut off at it's factory set number. If you know where the stat is .... remove it, look at it's condition and/or replace. Something is not allowing the stat to open and close correctly. Keep us in tune.