On Jan 2, 2:48*pm, Oren wrote:
On Sun, 02 Jan 2011 13:25:43 -0600, lh wrote:
I have all the tools and aptitude to do the job.

I was seeking information about the system. The way the plumbers are
talking, there are technical things they are not comfortable with.

I will check the filters and then flush the unit. If we decide to keep
the unit, I will add service valves.

The problem is that when taking a shower, the water suddenly turns
cold. *I imagine this could be a heat exchanger issue, a sensor issue,
or a flue gas issue.

Temperature adjustment?



The unit is a Bosch 125 natural gas . *It has not been serviced for
five years. The daughter called local plumbers and they declined to
work on it.

So. Is it this one? 12 Year Warranty?

http://www.tanklesswaterheatersdirect.com/shop/tanklesswaterheaters/m...

Troubleshooting/Maintenance/Etc.



A new unit will sell retail for 900 to 1000 dollars. If verical space
exists in the attic were the unit is located, we probably will buy a
Rinnai. I don't know what the additional cost will be.

I'm guessing at this stage if we get a plumber to replace the unit
costs will be $1500 to $2200. *I am at the age where I really don't
care to work that hard, but I will.

The plan now is to flush and service the unit ourselves and then if
change out is required, a closely monitored contractor will be used.

Two days ago, I couldn't even spell tankless water heater. :-)- Hide quoted text -

- Show quoted text -
Would there be anytthing to be gained by backflushing the heater?
That is, reverse the flow of the water going through the heater.
Might that
just cause a spall to come loose and clog the heater or would it be
OK?
Later,
Chuck