So you don't work on water heaters...even a thermocouple or heating element? Or are you talking about items under warranty.
I never touch them under warranty, I don't mess with power vents because I don't want to stock 100's of dollars of parts for all 3 mfg's of the heaters being used.
I'm now not installing/replacing water heaters because I just need to write it off as a piece of history, just like digging ditches in my earlier years.
Has to do with the risk of physical injury, the constant dull-drum of being price-shopped to death, the time span from pickup of heater to pulling away that crowds my schedule......1/2 a day is the worst case scenario, 2 hours if a perfect situation from supply house to collecting payment.
All of these new heaters are larger, bigger because of the FVIR application and/or R value requirement. Give a price over the phone and you get there,
dryer
ventilated shelving
condensate drain all of which have to be removed and reinstalled just to get the heater in.
I find the task very demeaning.....I don't think I've ever mentioned that before. It has a lot to do with being a hired monkey for sears/home depot/american home shield installing nothing but water heaters for a year straight, 3 to 5 a day. Physically impossible for me to do in my present day and time. Those were long days and the people had no respect for the installer.
They consider the talent of the replacement a simple one, and to a degree it really is. I felt like one of those Aaron's Rental places where you pick up furniture and replace it.
Homie say no mo!