This is to let you know that Ken Fears and friends have completed a most informative article on Hot Water Heaters (http://lazydazearticles.blogspot.com/2016/09/hot-water-heater-intro.html)
Thanks John Erik Judy Andy Ken for a thorough and valuable addition to the Companion. Well written! This kind of resource increases my confidence when dealing with systems I tak for granted till they fail to work. Then I reach for the Companion, study up, and proceed to fix or get service with a good foundation of knowledge.
Oops. Andy's experience with a bad wire, and Kristen's recent problems with a heater with an older panel revealed some things in the article that needed to be corrected. That has been done to address a wider range of issues and models.
Many thanks for keeping this vital information up to date, Ken!