AO Smith Proline has great hot water in a.m. — very little in p.m.??

[keithwdixon]

Hi everyone! Interested to hear your thoughts.

In the early part of my day, I'm very happy with my AO Smith water heater — family of four, pretty much all of us can get a hot shower, maybe 40 or so minutes of hot water there.

But at night? Completely different! I'd say there is 15 minutes tops of hot water, consistently. Can you think of any reason this would change over the course of the day????

Thanks for any thoughts!