I think lawyer's research time charges are like an auto mechanic's diagnostic charges. I would say "diagnostics" is a reasonable charge for an HVAC guy as well. Being so experienced, it doesn't take you long to diagnose. You'll just have to force yourself to mill around with a multimeter and a thermometer while you check ACC - but I don't really think that is ethical, reasonable or logical. As a customer, I would prefer to pay a higher price for an expert.There seems to be a difference between Lawyers and everybody else. I am expected to know my specialty before I arrive.