Before any decision
What the first visit should establish
A heater that has lost output, leaks or makes new noises can have several causes. The technician checks the parts that apply to your model, from heating elements and the thermostat on an electric unit to the pilot and thermocouple on a gas unit, along with valves, gaskets, fittings and the tank itself.
You should come away knowing which part failed, how the rest of the heater looks and what the repair involves. If the findings point toward replacement, ask what supports that conclusion before agreeing to it.
