I have a Takagi T-H2-DV-N tankless water heater. It's been in use for about 8 months now. It worked beautifully. Until this morning. I turned on my hot water, and it never got hot.
The error message on the heater is 711-Gas Solenoid Valve drive circuit failure. First off: What does this even mean? Second: How can this be fixed? Third: What would cause this issue in heater in use for less than a year?
Any help would be much appreciated!
As of now (way too complicated to explain why we haven't had this fixed yet) we have no hot water, and we have two small children, and it would be VERY helpful if someone could explain what all this means.
Link to manual: http://takagi-usa.com/download/product_manuals/T-H2.pdf