Well its wintertime in Texas. For those elsewhere that means we will have days like today at 70F then in a week it will be in the Teens.
About a month ago I drained everything thinking (100% incorrectly ) that this would be enough to get us through the winter if I kept the heat on. We had a pretty good freeze early.
Pretty sure this is why the HWH bypass valve failed.
Replaced the HTH Bypass valve then went online and bought some stuff on Amazon..I...