Eric wrote:
willshak wrote in
:


I have about the same set up but the water goes cooler rather than hotter
the longer it runs.

I assume you mean the water gets colder as you run more water. The
heater simply isn't keeping up with the cold water coming in.

How old is the heater?

I have noticed similar problems with water heaters as they age. They
seem to develop a wider range between when the burner turns on and off.

For example a new heater set to 140 may turn off at 140 and turn back on
at 130. As it gets older it may not turn back on until it gets to 110.

For something like that you may be getting 110 degree water in the
morning. The heater turns on but can't keep up with what you are
drawing out.

No adjustment available that I know of. Replacement of the control unit
most likely would not be worth it.