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 ...
The thermostats are not adjustable from the factory. There is an after market adjustable. one. Better to just mix with cold water. Make sure the ECO and thermostat are both tight to the tank. If they are loose, they can overheat.