The prognosis is ol trusty is dying, but as we've gotten 17 years of use out of her, I can't complain. When we had standard electric hot water heaters they often died by year five, even with cleaning the calcium out from time to time, I hope yours lasts a bit longer!
!BBH
!PIZZA
17 years?! what is this system? I want one. I replace a hot water heater, somewhere, nearly every year. Ka-ching!