I have the above control on my bathtub in a vacation home that we visit for
several months each year. This control is about 28 years old. It still
works ok, but lately we have noticed that it is very touchy to get the
settings for warm/cold water exactly how we would like it.
To explain: I can have the control set near the mid-range of the control,
and the water temp will be rather cool. If I turn the handle just 1/2 inch
more, the water is quite hot !! So, it is rather hard to adjust, without
being too hot or too cold.
Hot water heater is set at 135 degrees, and the cold water is spring-fed, so
it is really cold.
Question-- do these controls wear out so that we would see this symptom?
Does this sound normal ?
Thanks for any comments !!