Over the last couple months learning the various tests:T-pile, T-couple, Valve ohms, Valve epu, Gas pressure

input/manifold, switch continuity, etc... its been pretty fun and initially loved working on pellet systems but gas has to be

the most interesting and rewarding. So when I go out into homes I record all the above information for later use and

measurements against future years/predictive maintenance. I have been devouring manuals/schematics/manufacuer

troubleshooting guides asking tech as many questions as possible trying to find ways I can better identify component

failures, parameters of operation, tricks and tips etc.. I was just wondering what tests that overlooked and valuable.

Appreciate the feedback.