How many years have the Watts Premier Hot Water Recirculation Pump been in service in my house now? Somehow I never thought about tweaking its timer until recently.
First, the timer should be set to on only for the hours when anyone needs hot water. I did this since day one.
Second, for these needed hours, the timer does not need to be always on, because it takes a while for the water to cool down after the time goes off. Therefore, it is a very good idea to set the timer on for only 15 minutes for the hour (i.e. off for the rest 45 minutes). It's been working flawlessly this way for several weeks now.