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Takagi Flash T-K2 tankless water heater : any comments? We have had nothing but problems in one of our apartments. And now in another. The heat just shuts off, the water pressure is low – flow pressure, the water temperature is only warm and then turns to ice and now the water color is turning a slight brown color. We have called on 2 different plumbers on numerous ocassions and no one can figure this one out. Once they say it is fixed it no sooner breaks down again. Either the pump is bad or there is air getting into the flow system. We bleed the unit all the time to only have it break down again. And this has really put a hole in our wallet. Now we come to find the unit has been discountinued. Any comments or help?!!