On Wed, 03 Sep 2003 17:56:55 GMT, someone wrote:

He could have a broken dip tube so is not getting full capacity.

We need more info on the "intermittant" nature of the problem. All of
the above implicitly presumes that intermittant means "sometimes",
like when someone takes a long shower. What if intermittant means
sometimes as in random days once or twice a week under the same
conditions that were okay the other days. Then maybe he could have a
bad thermostat, it is possible even if not common.

-v.