A lot of Temecula homes are big, with several bathrooms and a household that uses hot water all at once. A tankless sized right handles that easily. One that's a little undersized, or one that's carrying years of scale, is the one that starts falling behind.
The water out here is hard, and the minerals build up as scale in the heat exchanger. As it thickens, the unit runs hotter than it should until it shuts itself down, and that's when the codes start.
Someone comes out, looks at the unit and how your household uses hot water, and gives you a straight answer. Sometimes it's a descale. Sometimes it's a unit that was never big enough for the house. Either way the options are explained in plain English, and the decision is yours.
