I got the following by email today:

I work for a Property Management company and we need a Service Tech to come
out to one of our propeties in Ventura. Can you help us? It is a Sears
Water Softener, and I am having a hard time finding some one to service it.
Please Advise ASAP!

This is because of the fixing a Sears Kenmore water softener article that I posted a long time ago.