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Posted by CL \"dnoyeB\" Gilbert on July 10, 2008, 8:39 am
cyd wrote:
> Last week we installed an electric tankless hot water system.
> Everything worked as expected for several days, so we know things were
> hooked up right. For the last couple of days there has been a strange
> hot water problem that no one can figure out. Here's what's
> happening:
> Hot water will only come out of the kitchen sink, but only if the
> bathtub is running full blast. Hot water will not come out of the
> kitchen sink if the tub is not running. The hot water to the kitchen
> sink does not cut out as long as the bath is running.
> Hot water will not come out of the tub valve or the valve in the bath
> sink at all now.
> Hot water will go into the clothes washer for a few seconds and then
> goes cold.
> IOW, the only hot water in the house goes to the kitchen sink, and
> then only when the tub is running.
> Other info: the bath valve is a single-control type. we tried
> replacing the mixing valve in the tub twice; no effect. we looked
> under the house to see if there is a hot water line leak, but there
> isn't. the tankless co. is sending out a new unit in case that's the
> problem.
> Does this make sense to any of you? Any theories?
>
> cyd ropp, homeowner
I don't have one personally but I have heard these things switch on at a
certain flow rate. So there is probably a flow rate detector thingy in the
heater that is broken. So its not properly detecting flow rate. So its
not heating fast enough to match the flow rate. I think the heater is
broken. Still could be a hookup problem.
CL
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