Someone I work with came to me and asked about a problem with his HS not heating correctly. The unit is about 6 YO and has a digital controller (just in case). Unfortunately I don't know the model (he didn't know either) and he suspects the "thermostat". I told him it should have a thermister (no thermostat in a digitally controlled unit) in the tub and suggested it might be in the filter compartment (he says it only has 1 big filter -?
). Also unfortunately the HS is about 200 miles away in his vacation home, I won't be doing any house calls.
Where can I tell him to look for the thermister (I realize it can be in different locations)?
Is it a readily available part (I assume yes) and how much is it approximately?
Anything else it could be? It sounds like it's heating but not exactly correctly.
Thanks!