DSI fault light on panel - Hot Water
I have a 2008 HR Neptune and on the inside panel (where all of the lights and indicators are, I have a 12V switch for hot water and a 120v switch. Above the switches is a small DSI Fault lite. When...
Forum Discussion
dougrainer wrote:Diplomat Don wrote:
The DSI fault light only pertains to the gas side of the water heater. If it's coming on when the gas is off and you're using 120 AC, then you have a weird issue where something is shorting out between the two systems.
IF the Electric side fails to shut OFF (defective tstat) and the ECO trips the DSI fault light will come on. IF you have the unit on LP AND 120 at the same time and the LP side fails to light, the DSI fault light will NOT come on. Doug
What is the ECO?
