A year ago, we had a plumber install a Nevian instant
hot-water heater at our home. Everything worked fine for
about four months.
sometimes when we turn on the bathtub water, it will be
cold, and it doesnít get hot unless you turn off the
faucet and turn it back on.
had the plumber out who installed the heater, and he
said that we must be getting a back feed from the washer
or dishwasher. He said to check that and left, which
doesnít solve anything.
did watch to see, when it did this, whether anything
else was running. There is no consistency to when it
happens. Nothing can be running at the same time, or
everything can be. The bathtub is the farthest point the
water runs to.
our plumber pretty much washed his hands of the issue,
we are at a loss as to where to turn next.
I think the plumberís leaving was for the best. The
last thing a homeowner needs is someone who canít be
bothered to solve a big problem with something he
heaterís name is actually Navien. The problem would
best be solved by dealing with the company directly.
Contact Navien at www.navienamerica.com. Make sure you
have all the pertinent information about the product you
purchased (serial and model numbers) and give detailed
information on your problem.
what you have described, my guess ó emphasis on guess
ó is that it might be the heater itself. Perhaps itís
a relay that worked fine at the start but had an
inherent fault that now forces you to try twice for hot
water, for example, because the message doesnít get
from the faucet to the component providing hot water on
the first try.
manufacturers, Navien included, have installers who are
not their employees but who have been trained to
troubleshoot such problems. That may be what it suggests
heater has a warranty; download the information for your
model at the website if you donít have a copy.
has shown not all manufacturers are great with service,
but you need to give it a try.